If x - (1/x) = 13, then the value of x2 + (1/x2) is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e 171.
| Understanding/Application |
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x - (1/x) = 13 sq. both side - (x - 1/x)2 = 132 |
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x2 + 1/x2 - 2x(1/x) = 169 x2 + 1/x2 = 169 + 2 = 171 |