Question

1: Number of terms of the A.P.21, 18, 15, ... that must be added to get the sum equal to zero
(1) 12
(2) 13
(3) 14
(4) 15
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Answer 1

Answer:

On solving the quadratic equation, we get n = 15 or 0. So, 15 terms must be added to get the sum.

Answer 2

Answer:

15

Number of terms of the A.P.21, 18, 15, ... that must be added to get the sum equal to zero

Step-by-step explanation:

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