Question

find a g p for which sum of first two terms is -4 and the fifth term is 4 times the third them

Answer 1

Answer:

let the first two terms be 'a' and 'ar'

ATQ,

a+ar= -4. ar^4=4(ar^2)

a(1+r)= -4 r^2=4

r=2 (r can't be negative)

So,. a(1+2)= -4

a= -4/3

GP: -4/3; -8/3; -16/3; ................