Asked by Sohaib

If 6th term of a GP is 9375 and its 4th term is 375.find its 9th term?
Answered by collins
a+5d=9375....(1)
a+4d=375....(2)

find a&d wont be difficult now just subtract 1 from 2

t9=a+8d
Answered by Steve
geometric, not arithmetic

A6 = ar^5 = 9375
A4 = ar^3 = 375

A6/A4 = r^2 = 9375/375 = 25
r = ±5

A9 = A6*r^3 = 9375 * ±125 = ±1171875
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