Answers

The Brainliest Answer!
2015-01-14T16:34:17+05:30
Let x be a let 1/x be b Therfore a*b=1 a+b=3 (a+b)^3=a^3+b^3+3ab(a+b) a^3+b^3=(a+b)^3-3ab(a+b) a^3+b^3=3^3-3*3{substituting the values} a^3+b^3=27-9=18 now, a^3=x^3 b^3=1/x^3 therefore, x³ + 1/x³=18
2 4 2
2015-01-14T19:43:15+05:30
(X+1/x)^3-3x*1/x(x+1/x)=(3)^3-3*3=18
0