Question

Find 12th term of an A.P whose nth term is 5n-4.

Answer 1

Answer:

Step-by-step explanation:

The 12th term of an AP, =80

Step-by-step explanation:

Given,

The nth term of an Ap,  5n - 2

To find, the 12th term of an AP,  

Put n = 1 , 2, 3, 4, ......., n

The 1st term of an AP,

5(1) - 2  = 5 - 2 = 3

The 2nd term of an AP,

5(2) - 2  = 10 - 2 = 8

The 3rd term of an AP,

5(3) - 2  = 15 - 2 = 13

....

The 12th term of an AP,

5(12) - 2  = 60 - 2 = 58

Hence, the 12th term of an AP,=80