1. 3x^4 – 14x^3 + 20x^2 – 11x + 2
2 1/4
3. 27
4. y^6/(x^4)(z^2)
5. f(g(x)) = x, g(f(x)) = x, g and f are inverses
6. The inverse of f(x) is (-x+6)/3 To find this, take the original equation, y= 6-3x, and replace the x with y and the y with x. Then solve for y: So.. y=6-3x if replaced by x = 6-3y. Now solve for y. x – 6 = -3y then (x-6)/(-3) = y then multiply top and bottom by -1 to get the answer. It us usual to not have a negative number in the denominator of the fraction. Get rid of it by multiplying both the top and bottom by -1.
7. x
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