Question : If
Option 1: 27
Option 2: – 29
Option 3: 29
Option 4: – 27
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Correct Answer: – 29
Solution :
Given equation,
Squaring the equation, we get,
⇒
Cubing equation (1), we get
⇒
⇒
⇒
Now consider,
Hence, the correct answer is – 29.
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