A motion picture film 120 feet long contains a certain number of individual pictures.If each picture were 0.1 of an inch shorter, the same film would contain 720 more pictures, how long is each picture?
A motion picture film 120 feet long contains a certain number of individual pictures.If each picture were 0.1 of an inch shorter, the same film would contain 720 more pictures, how long is each picture?
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当a>1时,在同一坐标系中,函数y=a-x与y=logax的图像是【 】
设f(x)是(-∞,+∞)上的奇函数, f(x+2)=-f(x),当0≤x≤1时,f(x)=x,则f(7.5)等于【 】
将y=2x的图像【 】,再作关于直线y=x对称的图像,可得到函数y=log2(x+1)的图像.
函数f(x)=1/x (x≠0)的反函数f-1 (x)=【 】
若函数y=f(x)的反函数是y=g(x),f(a)=b,ab≠0,则g(b)等于【 】
已知f(x)=2x+b的反函数为f-1(x),若y=f-1(x)的图像经过点Q(5,2),则b=______.
设函数y=f(x)是最小正周期为2的偶函数,它在区间[0,1]上的图像为如图所示的线段AB,则在区间[1,2]上,f(x)=__________.