Math, asked by isha7181, 1 year ago

if the sum of n terms open AP is 3n Square + 5 n find the AP hence find its 15th term

Answers

Answered by dhillonyuvrajsingh90

1

Answer:

an =3n square + 5n

n=15

an=3*15*15+5*15

=675+75

=750

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