根号下X+根号下1/X=2,那么根号下X/(X^2+3X+1)-根号下X/(X^2+9X+1)的值等于
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根号下X+根号下1/X=2,那么根号下X/(X^2+3X+1)-根号下X/(X^2+9X+1)的值等于
根号下X+根号下1/X=2,那么根号下X/(X^2+3X+1)-根号下X/(X^2+9X+1)的值等于
根号下X+根号下1/X=2,那么根号下X/(X^2+3X+1)-根号下X/(X^2+9X+1)的值等于
√x+√(1/x)=2 ===> [√x+√(1/x)]^2=4 ===> x+2+(1/x)=4
===> x+(1/x)=2
所以原式=√[x/(x^2+3x+1)]-[√x/(x^2+9x+1)]
=√1/[x+3+(1/x)]-√1/[x+9+(1/x)]
=√[1/(2+3)]-√[1/(2+9)]
=(√5/5)-(√11/11).
解方程:(根号下2x+1)+(根号下x-3)=()题为(根号下2x+1)+(根号下x-3)=2根号下x
如果 根号下x-根号下y等于根号下3+根号下2 根号下xy等于根号下6-根号下2 则 x+y=?
已知x=1/根号下3+根号下2,y=-1/根号下3-根号下2,那么x平方+y平方?急求
x^1/2=根号下x
(x+y)/(根号下x+根号下y)+2xy/(x根号下y+y根号下x)=______.(x+y)/(根号下x+根号下y)+2xy/(x根号下y+y根号下x)=______.
计算:(2/3x根号下9x+6x根号下y/x)+(y根号下x/y-x的平方根号下1/x)=
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如果根号下x-1/根号下x-2=根号下x-1/x-2,那么x的取值范围是
根号下(x+根号下x)求导
(x-根号下2)=根号下5×x(2-根号下2×x)
若根号下x+根号下-x有意义,则根号下x+1=
y=xarcsin根号下x/(1+x)+arctan根号下x-根号2-根号x求导
已知y=根号下x-2根号下2+根号下2根号2
根号下X+根号下1/X=2,那么根号下X/(X^2+3X+1)-根号下X/(X^2+9X+1)的值等于
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若x>0,y>0,且根号下x(根号下x+根号下y)=3根号下y(根号下x+5根号下y),求(2x+2根号下若x>0,y>0,且根号下x(根号下x+根号下y)=3根号下y(根号下x+5根号下y),求(2x+2根号下xy+3y)/(x-根号下xy+y
若根号下x+根号下x分之1=根号下6则根号下x-根号下x分之1?
根号下X^2+1=