Question

Which term of the ap 21 42 63 is 254

Answer 1

Answer:

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Step-by-step explanation:

First term of the AP, a=21

Common difference d=21

n

th

term is 210

Then,

210=a+(n−1)d

210=21+(n−1)×21

210=21n

Therefore, n=10

Hence, 210 is 10 th

term of the series.