Question

UNIT-1
1. The sum of first three terms of a G.P is 16 and the sum of next three terms is
128. Determine the first term, the common ratio and sum to n terms of the
G.P.
​

Answer 1

Answer:

Step-by-step explanation:

a+ ar+ ar^2. 16

———————- = ——-

ar^3+ ar^4+ ar^5. 128

a [ 1 + r + r^2]. 1

————————. =. ——

ar^3 [ 1 + r + r^2] 8

a & [1+r +r^2] cancel

1. 1

———- =. ———

r^3. 8

r = 2

Now you can find the remaining