\(\lim \limits_{(x,y) \to (2,0)} { { \tan xy} \over y} = \)______
举一反三
- \(\lim \limits_{(x,y) \to (2,2)} { { x + y} \over {xy}} = \)______
- \(\lim \limits_{x \to 0} 2 { { \tan x - \sin x} \over { { {\sin }^3}x}}{\rm{ = }}\)______ 。
- \(\mathop {\lim }\limits_{x \to 0} 2 { { \tan x - \sin x} \over { { {\sin }^3}x}}{\rm{ = }}\)______。______
- \( \lim \limits_{x \to 0} { {5 \tan 2x} \over {\sin 5x}} = \)______ 。
- \( \lim \limits_{x \to 0} {x^2}\sin {1 \over x} =\)______。______