lim x趋于0 f(x)/x^2=5 求lim x趋于0 f(x)=?

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lim x趋于0 f(x)/x^2=5 求lim x趋于0 f(x)=?

lim x趋于0 f(x)/x^2=5 求lim x趋于0 f(x)=?
lim x趋于0 f(x)/x^2=5 求lim x趋于0 f(x)=?

lim x趋于0 f(x)/x^2=5 求lim x趋于0 f(x)=?
∵lim x趋于0 5x^2 /x^2=5
∴f(x)=5x^2

limf(x)=lim{[f(x)/x^2]*x^2}=lim【f(x)/x^2】*lim(x^2)=0 (x趋于0)