Question

If the nth term of an arithmetic progression is (2n-1)find the 7th term

Answer 1

Given :

• nth term = 2n - 1

To Find :

• 7th term of the given A.P

Solution :

An = 2n - 1

A₁ = 2 × 1 - 1

A₁ = 1

A₂ = 2 × 2 - 1

A₂ = 3

A.P = 1 , 3 , 5 , 7 .......

Common difference = A₂ - A₁

→ 3 - 1 = 2

Now 7th term of the A.P

A₇ = a + 6d

→ A₇ = 1 + 6 × 2

→ A₇ = 1 + 12

→ A₇ = 13