Question

Which term of AP 21,42,63,84,.........IS 210? *

Answer 1

Answer:

Answer. Hence, the 10th term of an AP is 210.

Step-by-step explanation:

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Answer 2

Here,

a=21,an=210

d=a2-a1

d=42-21

d=21

an=a+(n-1)d

210=21+(n-1)21

210=21+21n-21

210=0+21n

210=21n

21n=210

n=210/21

n=10

Therefore 210 is the 10th term of the following AP.