1.

यदि `(x+1/x)=4` है तो `x^(4)+1/(x^(4))` का मान ज्ञात करें।A. 64B. 194C. 81D. 124

Answer» Correct Answer - B
`x+1/x=4`
Squaring both sides
`x^(2)+1/(x^(2))+2=16`
`x^(2)+1/(x^(2))=14`
Squaring again
`x^(4)+1/(x^(4))=196-2=194`


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