Question

The 4th term of an A.P is equal to 3 times the first term and the 7th ter
exceeds twice the 3rd term by 1. Find the A.P
​

Answer 1

Step-by-step explanation:

Given: In an AP:

A4=3(a)

a+3d=3a

3d=3a-a=2a

0=2a-3d----(1)

a7-2(a3)=1

a+6d-2(a+2d)=1

a+6d-2a-4d=1

(-a+2d=1)2

-2a+4d=2----(2)

By Elimination method:

2a-3d=0

-2a+4d=2

d=2-----(3)

(3) in (1):

2a-3(2)=0

2a=6

a=3.

Therefore the AP is 3,5,7,9..............

Answer 2

Step-by-step explanation:

answer attached in photo