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If x^2 + xy + 3y^2 = 1 then (x + 6y)^3 (...

If `x^2 + xy + 3y^2 = 1` then `(x + 6y)^3 (d^2y)/(dx^2)` is

A

`0`

B

`-12`

C

`22`

D

`-22`

Text Solution

Verified by Experts

The correct Answer is:
D
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