Question

hello friends
class 11 maths ncert chapter 4
Q.12. a+ar+ar^2+........+ar^n-1=a(r^n -1)/r-1​

Answer 1

Step-by-step explanation:

Hey buddy

it formula of G.P

pls mention complete Q

so that I can answer

Answer 2

Answer:

This is true.

We shall prove it by using Principle of Mathematical Induction

Step-by-step explanation:

Brainly is not good for writing such maths. Have a look on images given below created by me in corel draw.

Mark as brainlist if it helped