Question

If the nth term of A.P is 24 n=12 d=12 what is the value of a

Answer 1

Tn = a+(n-1) d
24 = a+(12-1) 12
24 = a+ 11×12
24 = a + 132
a = 24 - 132
a = - 108

Answer 2

Here, tn=24; n=12; d=12; a=?

tn = a+(n-1)d

24 = a+(12-1)12

24 = a+(11)12

24 = a+132

a = -108

Hence, the answer is -108.