Question

For an A.P. t2 = 13 and ts = 25, then find t7.​

Answer 1

Step-by-step explanation:

t2 = 13

a+d = 13 ---->1

T5 = 25

a+4d = 25 ----->2

sub 2 and 1

a+4d = 25

a+d = 13

3d = 12

d = 12/3

d = 4

substituting in 1

a+d = 13

a+4 = 13

a = 13-4

a = 9

t7 = a+6d

= 9+6(4)

= 9+24

t7 = 33