Practicing Success
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CUET
General Test
Quantitative Reasoning
Algebra
If $x+\frac{1}{x}=7$, then $x^2+\frac{1}{x^2}$ is equal to:
47
49
61
51
If $K+\frac{1}{K}=n$
then, $K^2+\frac{1}{K^2}$ = n2 – 2
If $x+\frac{1}{x}=7$,
then $x^2+\frac{1}{x^2}$ = 72 – 2 = 47