The calculated series of $T(n)$ is: $T(n)= {1,3,6,10,15,21,28,36,45,55,66}$ for $n=0$ to $n=10$, how do you...
The calculated series of $T(n)$ is: $T(n)= {1,3,6,10,15,21,28,36,45,55,66}$ for $n=0$ to $n=10$, how do you write this using sigma notation?
$T(n)$ contains the functions:
$T(n−1) + (n+1)$ for $ngeq1$
- $T(0) = 1$
sequences-and-series summation
add a comment |
The calculated series of $T(n)$ is: $T(n)= {1,3,6,10,15,21,28,36,45,55,66}$ for $n=0$ to $n=10$, how do you write this using sigma notation?
$T(n)$ contains the functions:
$T(n−1) + (n+1)$ for $ngeq1$
- $T(0) = 1$
sequences-and-series summation
1
You mean something like this: $$T(n)=sum_{k=1}^{frac{(n+1)(n+2)}{2}},1,?$$ I used sigma notation as requested.
– Batominovski
Sep 23 '18 at 17:21
1
These are triangular numbers. en.wikipedia.org/wiki/Triangular_number answers your question immediately.
– Matt
Sep 23 '18 at 17:21
for Batominovski, how was this arranged? "k=1" is the intial instance, so "((n+1)(n+2))/2" is the nth sequence? What is 1 for? These are indeed triangular numbers but i'm having a hard time understanding what sigma formula would be used for each instance of n from 0 to the nth number since the sequence is not a simple arithmetic or geometric format.
– JScribe
Sep 23 '18 at 17:33
1
I hope you realize @Batominovski was being a bit facetious.
– Don Thousand
Sep 26 '18 at 23:09
add a comment |
The calculated series of $T(n)$ is: $T(n)= {1,3,6,10,15,21,28,36,45,55,66}$ for $n=0$ to $n=10$, how do you write this using sigma notation?
$T(n)$ contains the functions:
$T(n−1) + (n+1)$ for $ngeq1$
- $T(0) = 1$
sequences-and-series summation
The calculated series of $T(n)$ is: $T(n)= {1,3,6,10,15,21,28,36,45,55,66}$ for $n=0$ to $n=10$, how do you write this using sigma notation?
$T(n)$ contains the functions:
$T(n−1) + (n+1)$ for $ngeq1$
- $T(0) = 1$
sequences-and-series summation
sequences-and-series summation
edited Sep 23 '18 at 18:35
rtybase
10.5k21533
10.5k21533
asked Sep 23 '18 at 17:16
JScribeJScribe
184
184
1
You mean something like this: $$T(n)=sum_{k=1}^{frac{(n+1)(n+2)}{2}},1,?$$ I used sigma notation as requested.
– Batominovski
Sep 23 '18 at 17:21
1
These are triangular numbers. en.wikipedia.org/wiki/Triangular_number answers your question immediately.
– Matt
Sep 23 '18 at 17:21
for Batominovski, how was this arranged? "k=1" is the intial instance, so "((n+1)(n+2))/2" is the nth sequence? What is 1 for? These are indeed triangular numbers but i'm having a hard time understanding what sigma formula would be used for each instance of n from 0 to the nth number since the sequence is not a simple arithmetic or geometric format.
– JScribe
Sep 23 '18 at 17:33
1
I hope you realize @Batominovski was being a bit facetious.
– Don Thousand
Sep 26 '18 at 23:09
add a comment |
1
You mean something like this: $$T(n)=sum_{k=1}^{frac{(n+1)(n+2)}{2}},1,?$$ I used sigma notation as requested.
– Batominovski
Sep 23 '18 at 17:21
1
These are triangular numbers. en.wikipedia.org/wiki/Triangular_number answers your question immediately.
– Matt
Sep 23 '18 at 17:21
for Batominovski, how was this arranged? "k=1" is the intial instance, so "((n+1)(n+2))/2" is the nth sequence? What is 1 for? These are indeed triangular numbers but i'm having a hard time understanding what sigma formula would be used for each instance of n from 0 to the nth number since the sequence is not a simple arithmetic or geometric format.
– JScribe
Sep 23 '18 at 17:33
1
I hope you realize @Batominovski was being a bit facetious.
– Don Thousand
Sep 26 '18 at 23:09
1
1
You mean something like this: $$T(n)=sum_{k=1}^{frac{(n+1)(n+2)}{2}},1,?$$ I used sigma notation as requested.
– Batominovski
Sep 23 '18 at 17:21
You mean something like this: $$T(n)=sum_{k=1}^{frac{(n+1)(n+2)}{2}},1,?$$ I used sigma notation as requested.
– Batominovski
Sep 23 '18 at 17:21
1
1
These are triangular numbers. en.wikipedia.org/wiki/Triangular_number answers your question immediately.
– Matt
Sep 23 '18 at 17:21
These are triangular numbers. en.wikipedia.org/wiki/Triangular_number answers your question immediately.
– Matt
Sep 23 '18 at 17:21
for Batominovski, how was this arranged? "k=1" is the intial instance, so "((n+1)(n+2))/2" is the nth sequence? What is 1 for? These are indeed triangular numbers but i'm having a hard time understanding what sigma formula would be used for each instance of n from 0 to the nth number since the sequence is not a simple arithmetic or geometric format.
– JScribe
Sep 23 '18 at 17:33
for Batominovski, how was this arranged? "k=1" is the intial instance, so "((n+1)(n+2))/2" is the nth sequence? What is 1 for? These are indeed triangular numbers but i'm having a hard time understanding what sigma formula would be used for each instance of n from 0 to the nth number since the sequence is not a simple arithmetic or geometric format.
– JScribe
Sep 23 '18 at 17:33
1
1
I hope you realize @Batominovski was being a bit facetious.
– Don Thousand
Sep 26 '18 at 23:09
I hope you realize @Batominovski was being a bit facetious.
– Don Thousand
Sep 26 '18 at 23:09
add a comment |
2 Answers
2
active
oldest
votes
So we have
begin{align}
T(0)&=1\
T(1)&=3\
T(2)&=6\
T(3)&=10\
T(4)&=15\
T(5)&=21\
T(6)&=28\
T(7)&=36\
T(8)&=45\
T(9)&=55\
T(10)&=66\
end{align}
So it appears that
$$ T(n)=sum_{k=0}^n(k+1) $$
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
add a comment |
Not to be a smart-arse but the following is another solution:
begin{equation}
S = sum_{t in T(n)} t
end{equation}
add a comment |
Your Answer
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
So we have
begin{align}
T(0)&=1\
T(1)&=3\
T(2)&=6\
T(3)&=10\
T(4)&=15\
T(5)&=21\
T(6)&=28\
T(7)&=36\
T(8)&=45\
T(9)&=55\
T(10)&=66\
end{align}
So it appears that
$$ T(n)=sum_{k=0}^n(k+1) $$
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
add a comment |
So we have
begin{align}
T(0)&=1\
T(1)&=3\
T(2)&=6\
T(3)&=10\
T(4)&=15\
T(5)&=21\
T(6)&=28\
T(7)&=36\
T(8)&=45\
T(9)&=55\
T(10)&=66\
end{align}
So it appears that
$$ T(n)=sum_{k=0}^n(k+1) $$
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
add a comment |
So we have
begin{align}
T(0)&=1\
T(1)&=3\
T(2)&=6\
T(3)&=10\
T(4)&=15\
T(5)&=21\
T(6)&=28\
T(7)&=36\
T(8)&=45\
T(9)&=55\
T(10)&=66\
end{align}
So it appears that
$$ T(n)=sum_{k=0}^n(k+1) $$
So we have
begin{align}
T(0)&=1\
T(1)&=3\
T(2)&=6\
T(3)&=10\
T(4)&=15\
T(5)&=21\
T(6)&=28\
T(7)&=36\
T(8)&=45\
T(9)&=55\
T(10)&=66\
end{align}
So it appears that
$$ T(n)=sum_{k=0}^n(k+1) $$
answered Sep 23 '18 at 17:49
John Wayland BalesJohn Wayland Bales
13.9k21238
13.9k21238
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
add a comment |
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
Thank you! that makes a lot of sense! and I found out k is better for sigma than doing multiple n notations.
– JScribe
Oct 2 '18 at 3:13
add a comment |
Not to be a smart-arse but the following is another solution:
begin{equation}
S = sum_{t in T(n)} t
end{equation}
add a comment |
Not to be a smart-arse but the following is another solution:
begin{equation}
S = sum_{t in T(n)} t
end{equation}
add a comment |
Not to be a smart-arse but the following is another solution:
begin{equation}
S = sum_{t in T(n)} t
end{equation}
Not to be a smart-arse but the following is another solution:
begin{equation}
S = sum_{t in T(n)} t
end{equation}
answered Jan 4 at 7:37
DavidGDavidG
1,874620
1,874620
add a comment |
add a comment |
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1
You mean something like this: $$T(n)=sum_{k=1}^{frac{(n+1)(n+2)}{2}},1,?$$ I used sigma notation as requested.
– Batominovski
Sep 23 '18 at 17:21
1
These are triangular numbers. en.wikipedia.org/wiki/Triangular_number answers your question immediately.
– Matt
Sep 23 '18 at 17:21
for Batominovski, how was this arranged? "k=1" is the intial instance, so "((n+1)(n+2))/2" is the nth sequence? What is 1 for? These are indeed triangular numbers but i'm having a hard time understanding what sigma formula would be used for each instance of n from 0 to the nth number since the sequence is not a simple arithmetic or geometric format.
– JScribe
Sep 23 '18 at 17:33
1
I hope you realize @Batominovski was being a bit facetious.
– Don Thousand
Sep 26 '18 at 23:09