Question

If (2n+3) is the nth term of an ap, find first term ,common difference and 20^thterm

Answer 1

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Answer 2

Answer:

the first term is 5,common difference is 2, 20 th term is 43

Step-by-step explanation:

An=(2n+3)

A1=(2*1+3)=(2+3)=5

A2={2*2+3)

=7

common difference =a2-a1=7-5=2

a20 = (2*20+3)

=40+3

=43