Question

The sum of first n terms of an AP is oppation (1). S=n/2{2a+(n+1)d}. (2). S=a+(n-1)d. (3). S=n{2a+(n-1)d} (4) . S=n/2{2a+(n-1)d}​

Answer 1

Answer:

4. n/2[2a + (n – 1)d]

it is the correct answer.

Answer 2

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(4) S=n/2{2a+(n-1)d

Step-by-step explanation:

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