khadijahazharr khadijahazharr

31-07-2021
Mathematics

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If a3 = 11 and a5 = 7 and ak is the -th term of the sequence and ak = -9, then what is the value of k?

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rastaft2005 rastaft2005

31-07-2021

An=a3+d

-9=11+-2

2n=26

n=13

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