Question

Q.8 Which term is 0 of the AP 27, 24, 21, .....?​

Answer 1

Answer:

Let first term be a=27

And common difference be  d=−3

According to question, sum is zero,

⟹2n[2a+(n−1)d]=0

⟹[54+(n−1)(−3)]=0

⟹n=19

Hence,  19 terms of AP should be taken to make sum zero.

Value of the last term, i.e;

a19=a+(19−1)d

⟹a19=27+(18)(−3)

⟹a19=−27

Answer 2

Answer:

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