f(x)=x^2,and if h is not zero,then f(x+h)-f(x)/h=?美国的数学题,
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f(x)=x^2,and if h is not zero,then f(x+h)-f(x)/h=?美国的数学题,
![f(x)=x^2,and if h is not zero,then f(x+h)-f(x)/h=?美国的数学题,](/uploads/image/z/5312504-56-4.jpg?t=f%28x%29%3Dx%5E2%2Cand+if+h+is+not+zero%2Cthen+f%28x%2Bh%29-f%28x%29%2Fh%3D%3F%E7%BE%8E%E5%9B%BD%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%2C)
h不等于0
则[f(x+h)-f(x)]/h
=[(x+h)^2-x^2]/h
=(x+h+x)(x+h-x)/h
=h(2x+h)/h
=2x+h
则[f(x+h)-f(x)]/h
=[(x+h)^2-x^2]/h
=(x+h+x)(x+h-x)/h
=h(2x+h)/h
=2x+h
f(x)=x^2,and if h is not zero,then f(x+h)-f(x)/h=?美国的数学题,
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