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Mathematics 9 Online
OpenStudy (anonymous):

Write the sum using summation notation, assuming the suggested pattern continues. 9 - 18 + 36 - 72 + ...

OpenStudy (anonymous):

these are the answers

geerky42 (geerky42):

We can easily see that it's either B or D because sign changes. so for first term (n=0) is 9. which do you think is answer?

OpenStudy (anonymous):

D, right?

OpenStudy (anonymous):

@geerky42

geerky42 (geerky42):

yep

OpenStudy (anonymous):

thank you <3

geerky42 (geerky42):

welcome

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