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Magazine Problem 21
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\left(1-4 x^{3}\right)^{-2}$$
Problem 22
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$5(x+1-1 / x)$$
Problem 23
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$4\left(2 x^{2}-x+3\right)^{-2}$$
Problem 24
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\frac{1}{1+1 / x}$$
Problem 25
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\frac{-3}{4 x^{2}-2 x+1}$$
Problem 26
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\left(x^{2}+1\right)(5-2 x) / 2$$
Problem 27
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\left(3 x^{2}+1\right)(2 x-4)^{3}$$
Problem 28
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\frac{x+1}{x-1}$$
Problem 29
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\frac{x^{2}-1}{x^{2}+1}$$
Problem 30
Find the derivatives of the functions. For extra practice, and to check your answers, do some of these in more than one way if possible. $$\frac{(x-1)(x-2)}{x-3}$$
