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Test Section08SolvingInEqTest

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Problem 1.

(1 point)
For what values of w is {w(w+3)-(3w+4)\over w-2}>0?





Problem 2.

(1 point)
For what values of z is 3-z-4z^2 negative?





Problem 3.

(1 point)
For what values of x is 4e^{3x-1} positive?





Problem 4.

(1 point)
For what values of x is 2xe^x + x^2e^x negative or zero?





Problem 5.

(1 point)
For what values of x is \displaystyle{2x^2-(2x+1)(2x)\over x^4}\ge 0?





Problem 6.

(1 point)
For what values of x is {1\over2\sqrt{x^2+1}}(2x) negative?





Problem 7.

(1 point)
For what values of t is -4t^2(t-1)>0?





Problem 8.

(1 point)
For what values of r is 2+\displaystyle{r\over r-3}>0?





Problem 9.

(1 point)
For what values of t is t^2-3t-4\ge0?





Problem 10.

(1 point)
For what values of n is 0\le{1\over2}-n<11?