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f(9)﹣1<f(4)<f(1)+1 f(1)+1<f(4)<f(9)﹣1 f(5)+2<f(4)<f(1)﹣1 f(1)﹣1<f(4)<f(5)+2
f1(t)*f2(t)←→F1(jω)F2(jω) f1(t)+f2(t)←→F1(jω)F2(jω) f1(t)f2(t)←→F1(jω)F2(jω) f1(t)/f2(t)←→F1(jω)/F2(jω)
1F=10μF 1F=102μF 1F=103μF 1F=106μF
f(-1)=f(1) f(-1)f(-1)>f(1) 无法确定
f(1)是f(x)的极大值 f(1)是f(x)的极小值 (1,f(1))不是曲线y=f(x)的拐点 f(1)不是f(x)的极值,但(1,f(1))是曲线y=f(x)的拐点
f(﹣1)>f(0)>f(1) f(0)>f(1)>f(﹣1) f(1)>f(0)>f(﹣1) f(0)>f(﹣1)>f(1)
f(1)是函数f(x)的极大值. f(1)是函数f(x)的极小值. (1,f(1))是曲线y=f(x)的拐点. f(1)不是函数f(x)的极值,(1,f(1))也不是曲线y=f(x)的拐点.
f(O.)<f(﹣1)<f(4) f(0)<f(4)<f(﹣1) f(4)<f(=1)<f(0) f(﹣1)<f(O.)<f(4)
f(3)<f(﹣2)<f(1) f(1)<f(﹣2)<f(3) f(﹣2)<f(1)<f(3) f(3)<f(1)<f(﹣2)
f(2.5)f(2.5)>f(1)>f(3.5) f(3.5)>f(2.5)>f(1) f(1)>f(3.5)>f(2.5)
f(1)<f(1﹣a)<f(1﹣2a) f(1)<f(1﹣a)<f(1+2a)
f(1﹣a)<f(1﹣2a)<f(1) f(1+2a)<f(1﹣a)<f(1)
f(-4)>f(1) f(-4)=f(1) f(-4)不能确定
f'(1)>f'(0)>f(1)-f(0) f'(1)>f(1)-f(0)>f'(0) f(1)-f(0)>f'(1)>f'(0) f'(1)>f(0)-f(1)>f'(0)
f(1)>c>f(-1) f(1)<c<f(-1) f(1)>f(-1)>c f(1)<f(-1)<c