Question which-
Which of the following functions has(have) a minimum value at ?
we only
Iwe only
we and II
Neither we nor II
Which of the following functions has(have) a minimum value at - 3 ? f ( x
Hard-difficulty · SAT Math · Nonlinear Functions — Exponential growth and decay functions. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice D is correct. A function of the form , where and , is a decreasing function. Both of the given functions are of this form; therefore, both are decreasing functions. If a function is decreasing as the value of increases, the corresponding value of decreases; therefore, the function doesn’t have a minimum value. Thus, neither of the given functions has a minimum value.
Choice A is incorrect and may result from conceptual or calculation errors.
Choice B is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect and may result from conceptual or calculation errors.
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