Question

If first term of an ap having n terms is X and the last term is Y then find the sum of first n terms of an ap.

Answer 1

Answer:

(X + Y ) . n/2

Step-by-step explanation:

(X + Y ) . n/2

Answer 2

Answer:

no. of terms = n

first term = x

last term = y

so,

sum of n terms = n/2(first term + last term)

sum = n/2(x + y)

hope it helps

mark as brainliest.