Question

daca x+1/x=4,calculați x^3+1/x^3​

Answer 1

x+1/x=4

x+1=4x

1=4x-x

3x=1

x=⅓

x×3+1/3x=

⅓×3+1 3/3 +1 1+1 2

=________ = _______ = ____ = ___ = 2

3×⅓ 3/3 1 1