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यदि `x+1/(4x)=3/2` है तो `8x^(3)+1/(8x^(3))` का मान ज्ञात करें।A. 18B. 36C. 24D. 16 |
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Answer» Correct Answer - A `x+1/(4x)=3/2` Multiply by 2 both sides `:. 2x+1/(2x)=3` Take cube both sides `=(2x+1/(2x))^(3)=(3)^(3)` `=8x^(3)+1/(8x^(3))+3xx 2x xx 1/(2x) (2x+1/(2x))` `=27` `=8x^(3)+1/(8x^(3))+3xx3=27` `8x^(3)+1/(8x^(3))=27-9=18` |
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