1.

यदि `x=3^(1/3)-3^(1/3)` का `3x^(3)+9x` मान क्या होगा?A. 8B. 9C. 7D. 16

Answer» Correct Answer - A
`x+3^(-1/3)=3^(1/3)`
`x^(3)+1/3+3xx x3^(-1/3)(x+3^(-1/3))=3`
`x^(3)+1/3+3xx x3^(-1/3)xx 3^(1/3)=3`
`3x^(3)+9x=9-1=8`


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