limx趋近于∞5^n×sin(x/5^n)求极限

limx趋近于∞5^n×sin(x/5^n)求极限 lim1/根号n＊sin （n趋近于无穷）,limx^3+1/4-x^2(x趋近于2),limx^2+1/x-1/x^2(x...lim1/根号n＊sin （n趋近于无穷）,limx^3+1/4-x^2(x趋近于2),limx^2+1/x-1/x^2(x趋近于-2) limx趋近于0sin(1/x)/(1/x) limx趋近于1 sin(1-x^2)/1-x limx趋近于0 (tanx-sinx)/sin^3x limx趋近于0y趋近于0sin(xy)/x求极限. limx趋近于0 sin(x+1)-sin(1-x)/x= 求limx趋近于无穷大(3x^2+5)/(5x+3)sin1/x的极限值 证明limx^2-6x+5/x-5=-4,x趋近于-3 limx趋近于无穷大(2x+1)^3(x-3)^2/(x^5+4) lim sin 2x / sin 5x lim arctan x / xx趋近于0 x趋近于0 limx趋近于+∞(5x-根号下(ax^2-bx+1)=1,求a,b limx趋近于0sin3x/2x limx趋近于0 tan2x分之x limx趋近于0lnsinx/x limx趋近于0x分之tan2x limx趋近于0x乘cot3x limx趋近于无穷(1/x)sin((x^2+1)/x)要过程