Question

given T3=15 S10=125 d=? and find T10​

Answer 1

Here you go.. D = -5

T10 = 8

Answer 2

here is your answer

t3 = a+2d

15 = a+2d

a = 15-2d

s10 = 10/2(2[15-2d] + 9d)

125 = 5 (30+5d)
-5 = 5d

so, d = -1 a= 17


so, T10 = a+9d
= 17+ 9(-1)
= 8 ans.

☺hope it helps you ☺