Question

Which term of the A.P. 3, 8, 13, 18, … is 78?

1 point

A. 12th

B. 13th

C. 15th

D. 16th

​

Answer 1

Let 78 be nth term.

Here, a = 3

d = 8 - 3 = 5

Tn = 78

a + (n-1)d = 78

=> 3 + (n-1)5 = 78

=> (n-1)5 = 75

=> n - 1 = 15

=> n = 16

Thus, 78 is the 16 th term.

Answer 2

Answer:

C. 15 is the answer

I hope it will be helpful to you

then please mark my answer as brainlist answer