Question

If nth term of AP: 3, 8, 13, 18, … is 78. Then the value of n is​

Answer 1

Step-by-step explanation:

16 th term.

hope it is helpful.

Answer 2

Answer:

n=16

Step-by-step explanation:

AP:3,8,13,18.....78

a=3 ; d= 5 ; nth term =78

nth term = a+ (n-1)d

78=3+(n-1)5

78-3=(n-1)5

75=(n-1)5

75/5=(n-1)

15=(n-1)

15+1=n

16=n

n=16