Question

first term of an AP is 5and the last term of the AP is 3 if there are 3 terms in AP what will be their sum?​

Answer 1

Answer:

The answer will be 12.

Step-by-step explanation:

Sum of n terms or Sn = (n/2)( a + al)

here, n = no. of terms

a = first term

al = last term

Sn = sum of n terms.

Thus, Sn = (3/2)( 5+3 )

= (3/2) × 8

= 3 × 4

= 12.

That's all.