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函数   题数:57
The y-intercept of a line L is 4. If the slope of L is negative, which of the following could be the x-intercept of L ?I -1II 0III 6
For all numbers a and b, the operation # is defined by a # b = 2a + 2b + 1. What is the value of 6 # 1 ?
According to a financial analyst, if Company C sets the unit selling price of its product at x dollars, then its monthly profit P, in dollars, is given by the formula P = 1,000(4x - x^2 - 2). According to this formula, at what amount should Company C set the unit selling price of its product so that its monthly profit is $2,000 ?
If (73/4)n=7 ​, what is the value of n ?
For which of the following functions is f(a + b) = f(a) + f(b) for all positive numbers a and b ?
If [x] is the greatest integer less than or equal to x, what is the value of [–1.6] + [3.4] + [2.7] ?
The function f is defined by f(x) = - 1x ​ for all nonzero numbers x. If f(a) = - 1/2 and f(ab) = 1/6, then b =
In the rectangular coordinate system above, the line y = x is the perpendicular bisector of segment AB (not shown), and the x-axis is the perpendicular bisector of segment BC (not shown). If the coordinates of point A are (2,3), what are the coordinates of point C ?
As x increases from 165 to 166, which of the following must increase?I. 2x–5II. 1–1/xIII.1/(x2–x)
An operation θ is defined by the equation a θ b = a−ba+b ​ , for all numbers a and b such that a ≠ –b. If a ≠ –c and a θ c = 0, then c =
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