Question

If nth term of GP is (-3)^n÷2^n-1 then common ratio is
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Answer 1

Step-by-step explanation:

an+1=(-3)^n+1/2^n

an=(-3)^n/2^n-1

common ratio=an+1/an

=(-3)^n+1/(-3)^n. *(2^n-1/2^n)

=(-3)^n+1-n *(2)^n-1-n

=-3/2

Answer 2

Step-by-step explanation:

formula r = t2/t1

use this formula to find r ( common ratio )

t1 is given i.e ((-3)^n)/(2^(n-1)) just add +1 to get t2

that is ((-3)^(n+1))/2^n. and after that do mathematical operation s properly and ta da!!!

you got ur ans which is -3/2