x+1/x=2root3 then value x ^ 3+1/x^3
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Good Afternoon
We know that ( a³ + b³ ) =
( a + b )³ - 3ab ( a + b )
x³ + 1/x³ = ( x + 1/x )³ - 3 ( x + 1/x )
x³ + 1/x³ = ( 2√3 )³ - 3 ( 2√3 )
x³ + 1/x³ = 24√3 -6√3
x³ + 1/x³ = √3 ( 24 - 6 )
x³ + 1/x³ = 18√3
anu12381:
how to multiply root
Did u mean (√3)³
(√3)³ = √3 × √3 × √3 = (√3)² × √3 = 3√3
no
Then?
2root3 cube
ok see
(2√3)³ = 2³ × (√3)³ = 8 × (√3)³ = 8×3 √3 = 24√3
ok thanks
Fine.
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