y= (X^2+1)^0.5+(X^2-2X+5)^0.5的最小值
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mathematica软件,已知y[x],Y=f1(x),X(x)=f2(x),如何plot Y[X]?y[x_] := x + 9.81/2*x*xk=1X[x] = x - k*y'[x]/(1 + (y'[x])^2)^0.5Y[x] = y[x] + k/(1 + (y'[x])^2)^0.5Plot[{y[x],Y[X],},{x,0,2}]
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
y=2x*(*代表X)y=(lnx)*y=(x/1+X)*
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
若√x-1-√1-x=(x+y)²先化简再求值:(1/2x)-(1/x+y)[x²-y²+(x+y/2x]
先化简,再求值 (1)[(x-y)的平方+(x+y)(x-y)]÷2x 其中X=2010,y=2009 (2)y(x+y)+(x+y)(x-y)-x的平方,先化简,再求值(1)[(x-y)的平方+(x+y)(x-y)]÷2x 其中X=2010,y=2009(2)y(x+y)+(x+y)(x-y)-x的平方,其中x=-2,y=二分
matlab画二元函数图像z = (x/(x+y) + 1.96*1.96/(2*(x+y)) - 1.96 * ((x/(x+y)*(1-x/(x+y))+1.96*1.96/(4*(x+y)))/(x+y))^0.5)/(1+1.96*1.96/(x+y))该怎么画
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()
已知x+y=a,2x-y=-2a,求[(x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值
若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值
通分计算:(1)2x-3/(x-1)(x-4) - x-2/(1-x)(4-x) (2)x平方-y平方/xy - xy-y平方/x(y-x)还有:先化简再求值: (1)2x/x平方y平方 + x/y平方-x平方 + y/(x-y)(x+y) 其中x=4 y=-3 (2)已知(
(3x²-2x²-2y)÷(x+y) 化简【3x²-2x(x+y)+y(2x-y)】÷(x+y)其中x=1/2 y=1/3
先化简,再求值:(3/2x)-(1/x+y) X[(x+y/2x)-x-y],其中x=2010,y=2011
1/2x=0.5y则y/x()/().
1/2x=0.5y则y/x()/().
1x=0.5y 2x=2y 3x=4.5y 求规律.(如y=...)如果y是1.5,x是多少?
2y(x+二分之一y)-[(x+y)(x-y)+2y(y+x)],其中|x-1|=2