lim(x趋于0时) sin(4x)/ 根下(x+2)-根下2
lim(根号下(1+sin^2x)-1)/xtanx x趋于0
计算lim(x趋于正无穷)(根号下2*x+9-根号下2*x+4
x趋于无穷大,求lim[根号下(x^2+x)]-[根号下(x^2-x)],
x趋于无穷大,求lim[根号下(x^2+x)]/[根号下(x^2-x)],
x趋于0时,lim(x^2-sin^2 xcos^2 x)/(x^2sin^2 x)怎么转换成(x^2-(1/4)sin
x趋于0时(根号下|x|)sin(1/x^2)的极限
lim sin(y×x^2+y^4)/(x^2+y^2) x,y都趋于0,
x趋于0时,求lim(x-tanx)/x^2,
求极限lim(x趋于0时)sin(sinx)/x
lim x趋于0 [sin(a+x)sin(a+2x)-sin^2a]/x 求极限
求极限((1-根号下x^2+1)/x^3y^2)sin(xy),当x,y趋于0时
lim X sin (1/2x) 当x趋于无穷大时