250x - 2(x+50)(x+0.5)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
3.14*(0.5x)(0.5x)*2x=50
5*(x-2)=4*(x+3) 2x+(50-x)*4=140 3x-(8-x)=20*4 200x=(x-0.5)*2
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x
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先化简再求值先化简再求值:(x-x/x+1)(x+1/x^2+4x+4)(x^2-4/x^2-2x),其中x=-0.5
怎么用MATLAB解超越方程cos(x)-2*x*sin(x)-x-0.5*sin(x)*cosh(x)/sinh(x)
x^2+x-2
x(x+2)
x^2+x+a