Question

Determine the first term and the common ratio
of the geometne progression, the sum of whose
First and third terms is 40 and the second and fourth term is 80 ​

Answer 1

Step-by-step explanation:

a=40

let four terms be a/r^3,a/r,ar,ar^3

a/r^3 + ar=40

a/r^2 + a =40.............eq(1)

a/r + ar^3 =80

a+ar^2. =80.............eq(2)

sry I can't solve beyond thatO:-)