akiyamamayumi1 akiyamamayumi1

07-07-2018
Mathematics

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the first term of an ap is -2 and the10th term is 16. find its 15th term

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Аноним Аноним

07-07-2018

First find the common difference :-

10th term - fist term = 9 * common difference

9d = 16-(-2)
9d = 18
d = 2

so the 15th term
= a1 + 14d
= -2 + 14*2 = 26 (answer)

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