Question

If the 2nd and 4th terms of a G.P are 8&32 respectively, what is the sum of the 1st four terms

Answer 1

Answer:

60

Step-by-step explanation:

2nd term = 8

4th term = 32

let 3rd term be x.

then..

(3rd term) / (2nd term) = (4th term) / (3rd term)

=> x / 8 = 32 /x

=> x² = 32 × 8

=> x = 16

thus, 3rd term will be :- 16

Similarly, 1st term will be :- 4

thus, sum of first four terms = 4+ 8+ 16 +32 = 60