Question

the sum of first n terms of an AP is 4n^+2n.Find the nth term of this AP.​

Answer 1

Answer:

Step-by-step explanation:

0,-5

Answer 2

SOLUTION

Sn= 4n^2+ 2n

=) S1= a1=4+2

=) a1= 6

S2= 4× 2^2+2×2

=)16+4

=) 20

a2= S2-a1

=) 20-6

=) 14

d= a2- a1

=) 14-6

=) 8

an= a1+(n-1)d

=) 6+ (n-1)8

=) 6+ 8n-8

=) 8n-2

=)2(4n-1)

hope it helps ☺️