Question

the sum of first five terms of the g.p is y, y/3,y/9,.... where y>0 is 121. find y.​

Answer 1

Answer:

y = 81

Step-by-step explanation:

we have given,

$y + \frac{y}{3 } + \frac{y}{9} + \frac{y}{27} + \frac{y}{81} = 121$

$\frac{81y + 27y + 9y + 3y + y}{81} = 121$

$121y = 121 \times 81$

$y = 81$