OpenStudy (anonymous):

PLEASE HELP MEDAL WILL BE GIVEN NEED HELP ASAP. write the sum using summation notation, assuming the suggested pattern continues -1+2+5+8+...+44

3 years ago
OpenStudy (anonymous):

@aaronq @Compassionate @confluxepic

3 years ago
OpenStudy (anonymous):

@ganeshie8 @mathstudent55

3 years ago
OpenStudy (kirbykirby):

Hint: $$-1+3(0)=-1 \\ -1+3(1)=2\\ -1+3(2)=5\\ -1+3(3)=8 ...$$ Do you see the pattern? Notice how you can replace the number that keeps changing by a variable to be used in summation notation

3 years ago
OpenStudy (anonymous):

$\sum_{n=0}^{\infty}(-1+3n)$

3 years ago
OpenStudy (kirbykirby):

That is almost it! :) The sum ends at 44 though, it doesn't continue till infinity, so you need to figure out the number at which is stops. This can easily be done with a small equation: $$-1+3n=44$$

3 years ago
OpenStudy (anonymous):

$\sum_{n=0}^{15}(-1+3n)$

3 years ago
OpenStudy (kirbykirby):

awesome :)!!

3 years ago
OpenStudy (anonymous):

sweet okay thank you

3 years ago
OpenStudy (kirbykirby):

np

3 years ago