Question

The 20 first term of the
a.p whose first two term are_3 and_4 is

Answer 1

Answer=23

Step-by-step explanation:

a=3 , a2=4 , d=a2-a=4-3=1

n=21

an=a+( n-1 ) d

= 3+( 21-1 ) 1

= 3+ 20

= 23

therefore the 20 first term is 23.