Question

which term of the AP:3,8,13,18,...,is 78?​

Answer 1

The formula for the general term is an=a+(n-1)d

In this case

a=3

d=5

Thus 78=3+(n-1)5

78=3+5n-5

70=5n

n=14

Thus the 14th term is 78

Answer 2

Answer:

the 16th term of given A.P. will be 78

Step-by-step explanation:

see the attachment....