Question

If the first term of a G.P is 25 and the 10th term is 12800 then find its common ratio.​

Answer 1

Answer:

first term a=25

tenth term=12800

We know that

g.p= a base n = ar^n-1

here a base n = 10 ( tenth term)

so,

10= 25×r^10-1

10= 25r^9

r^9=10/25=2/5

r=9✓2/5