Question

find the Sum of first 24 terms whose
nth term is an = 3+2n​

Answer 1

Answer:

I hope it's help you

bbbbjjjjj

Answer 2

Answer:

672

Step-by-step explanation:

nth term =3+2n

so,1st term =3+2*1=3+2=5=a

2nd term=3+2*2=3+4=7

3rd term=3+2*3=3+6=9

so,common difference d=2

sum of first 24 terms is

n/2{2a+(n-1)d}

24/2{2.5+(24-1).2}

=12{10+23*2}

=12(10+46)

=12*56

=672