Question

In an AP an =2ñ-1. Find 3rd term of AP ​

Answer 1

In a AP

an = 2n -1

so 3rd term it means n= 3

a3 = 2 (3)-1 = 5

Answer 2

Step-by-step explanation:

• Step-by-step explanation:LET ,n=1

1. Step-by-step explanation:LET ,n=1a1=2(1)-1=1
2. Step-by-step explanation:LET ,n=1a1=2(1)-1=1LET, n=2

• Step-by-step explanation:LET ,n=1a1=2(1)-1=1LET, n=2a2=2(2)-1=3
• Step-by-step explanation:LET ,n=1a1=2(1)-1=1LET, n=2a2=2(2)-1=3d=a2-a1

Step-by-step explanation:LET ,n=1a1=2(1)-1=1LET, n=2a2=2(2)-1=3d=a2-a1 =3-1

=2

• =2a3=a+2d

=2a3=a+2d =1+2*2

=5