Question

the fourth term of an AP is 4 .the sum of the first 7terms is​

Answer 1

dhbsjskajabsbssksvsvdhhdbd. XD

Answer 2

Answer:

28

Step-by-step explanation:

Let the no in Ap be a, a+d,... with common difference d

Given a+3d =4

sum of 7 terms

$\frac{n}{2} (2a + (n - 1)d) \\ = \frac{7}{2} (2a + 6d) \\ = \frac{7}{2} \times 2(a + 3d) \\ = 7 \times 4 \\ = 28$