Question

how many terms of the ap 63,60,57 .....must be taken so that their sum is 693

Answer 1

refer to the image attached for solution....n=21or 22

Answer 2

Heya!!

Here lam attatching the solution:

Number of terms = 22 or 21.

l have forgotten to right how 21 can be obtained.Here its:

21 can b obtained when -b^2 - 4ac/2a is done.

Hope it helps

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