Question

12. If the sum of three terms of GP is 19 and product is 216, then
the common ratio of the series is
(a)-3 upon 2


(b) 3 upon 2
(c) 2
(d) 3​

Answer 1

I THINK IT IS (B)

I AM NOT SURE OK BRO....

THANK YOU...--^^^---

Answer 2

Answer:

b)3 upon 2 is the answer

Step-by-step explanation:

let the three numbers be a/r ,a,ar

a/r×a×ar=216

a^3=216

a=16

a/r +a+ar =19

a+ar+ar^2/r=19

substitute value of a, i.e. a=6

6+6r+6r^2=19r

6r^2-13r+6=0

6r^2-9r-4r+6=0

3r(2r-3)-2(2r-3)=0

2r-3=0. 3r-2=0

r=3/2. or. r=2/3

according to the options, 3/2 is the answer