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If x+1/x=3 find the value of xcube +1/xcube |
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Answer» Step-by-step explanation: Given, X− x
=5 Squaring both the sides, ⇒(x− x 1
) =5 2
⇒x 2 + x 2
1
−2(x)( x 1
)=25 ⇒x 2 + x 2
1
=25+2 ⇒x 2 + x 2
1
=27 Now, x 3 − x 3
1
=(x− x 1
)[(x) 2 +( x 1
) 2 +(x)( x 1
)] =5(27+1) =140 |
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