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Question

A.

5774

B.

4096

C.

5776

D.

5778

Correct option is D

Given: ​
​y−1y=4y - \frac{1}{y} = 4 
Formula Used: 
 y−1y=kthen,y2+1y2=k2+2y3−1y3=k3+3k\begin{aligned}&y - \frac{1}{y} = k \quad \text{then}, \\ & y^2 + \frac{1}{y^2} = k^2 +2 \\ & y^3 - \frac{1}{y^3} = k^3 + 3k \end{aligned}​​
Solution:
​

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