Question

A=1, an=11 and sn =36 find n

Answer 1

Given :

A = 1

AN = 11

SN = 36

Procedure :

Here A is 1, then AN can be written as 1×N.

So,

AN = 1×N = 11

= N = 11/1 = 11

Now,

N = 11

Therefore, SN can be written as S×11.

So,

S × 11 = 36

S = 36/11

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