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Mathematics 12 Online
OpenStudy (anonymous):

Find the indicated sum. 4 E k=1 (-1)k(k+1), A.2, B.54, C.46, D.-54

OpenStudy (anonymous):

PLLLLLLZZZZZZZZ Help this is not a easy question for me i cant fail this test

OpenStudy (anonymous):

k = -k^2-k k =0 or k =2

OpenStudy (anonymous):

Thats all that i have to do im not good with this math

OpenStudy (anonymous):

No one is maths is a dark and scray world

OpenStudy (anonymous):

So thats all that i would have to do

OpenStudy (anonymous):

yes expand and solve :)

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