Question

If the third term of an A.P is 7
and the 6th term is 18 then find
the sum of first 5 terms.​

Answer 1

Answer:

98/3

Step-by-step explanation:

hope it helps

Answer 2

Step-by-step explanation:

3rd term = 7

6th term = 18

(m-n)d= a6-a3

(6-3)d=18-7

3d=11

d=11/3

a=7-22/3=-1/2

sum= n/2(2a+(n-1)d)

5/2(-1+44/3)

5/2×41/3

205/6