Question

Use the horizontal line test to identify one-toone functions. 21. Use the horizontal line test to determine which of the following functions is a one-to-one function and therefore has an inverse. (A) $y=x^2+4 x+6$ (B) $y=|2 x|-1$ (C) $y=\frac{1}{x^2}$ (D) $y=3 x+8$ (E) $y=\sqrt{25-x^2}$

   Use the horizontal line test to identify one-toone functions.
21. Use the horizontal line test to determine which of the following functions is a one-to-one function and therefore has an inverse.
(A) $y=x^2+4 x+6$
(B) $y=|2 x|-1$
(C) $y=\frac{1}{x^2}$
(D) $y=3 x+8$
(E) $y=\sqrt{25-x^2}$

Calculus for dummies: 1,001 calculus practice problems

Patrick Jones 1st Edition

Chapter 1, Problem 21

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Use the horizontal line test to identify one-toone functions. 21. Use the horizontal line test to determine which of the following functions is a one-to-one function and therefore has an inverse. (A) $y=x^2+4 x+6$ (B) $y=|2 x|-1$ (C) $y=\frac{1}{x^2}$ (D) $y=3 x+8$ (E) $y=\sqrt{25-x^2}$

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