Question

the sum of n terms of the GP 3,6,12... is 189.find the value of n also find the 10th and the 15th term​

Answer 1

Step-by-step explanation:

Question is wrong, nth term must be 192 ,then only we can find its no. of term.

But since,

we know that-

common ratio(r) =2

first term (a)=3

By applying formula-

Therefore,10th term= ar^ n-1

=3*2^10-1

=3*2^9

=3*512

=1536

Then,similarly find 15th term by applying same formula.

It may be helpful to you

But if anything is wrong then please sorry