Question

If $3+\frac{1}{4}(3+d)+\frac{1}{4^2}(3+2d)+\dots \dots +$ upto $\infty =8$, then the value of $d$ is

• A. 9
• B. 5
• C. 1
• D. none of these

Answer 1

Answer: (A)

Correct answer is (a) 9