exam
Maths Puzzle
Numerical Ability
x^-1.5=27 . . . . . . I know that the answer is 1/9, but I have no idea how to get there.
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exam Other Question
x^3-27 over 5x^2+15x+45
show work
-x^3(9-x^2)^(-1/2)+2x(9-x^2)^(1/2)