Question

In an A.P sum of the 5th term and 10th term is 83. difference of 12th term and 7th term is 25. then write A.P​

Answer 1

Step-by-step explanation:

They look like this, a, a+d, a+2d.. a + (n-1)d

6th and 11th are 20 and 30

The 6th term is a+5d while the 11th is a + 10d

a+10d = 30

a+5d = 20, subtract these two

5d = 10, d=2

Plug this d back in to get a+20=30, a = 10

A is the first term while d is the common difference so

the first term is 10 and the common difference is 2.