Question

210 is the......... term of the AP21, 42,63,84,.......​

Answer 1

Answer:

10th

Step-by-step explanation:

The common difference for the AP d = 21

The first term of AP a = 21

We know that nth term of AP is equal to

= a + (n-1)d            ----(A)

using equation A putting values of a and d

21 + (n-1)21 = 210

n-1 = 9

n = 10

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Answer 2

Answer:

a=21 and d=21. substitute in l=a+(n-1)d.we get 10