1.

pqq 6. A, P. : 21, 42, 63, 84,虱wh7-mr ut210 t:

Answer»

In the given A.P ;a = 21d = 42-21 = 21l = 210n = ?

l = a +(n-1)d210 = 21+(n-1)21n-1 = 189/21n = 9+1n = 10th term

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