Question

if sum of three consecutive terms of an ap is 21 then find the first term​

Answer 1

Step-by-step explanation:

Let the three consecutive terms in AP be a - d, a, a+d

Where a is the first term and D is the common difference.

According to the given information:

a - d + a + a+d = 21

3a = 21

a = 21/3

a = 7

Hence the first term of the AP is 7.

Answer 2

Answer:

7 is the answer.hope this helps