(x+60)x(1+10%)-(1-20%)x=120
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
求几道解方程数学题60%x+25=40 x+30%x=52 19-120%x=7 x-10%x=18 (1-25%)x=
(X-X*20%-18-(X-X*20%-18)*10%=X*1/2-3(过程)
X+1-3X=5X+10 6-3X=5X-20
x-8/5x=15 5/1x+10/3x=120 20%x=30
x/2+x/8+x/12+x/20=1
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
x+2/3x=60 x-3/5x=120 4x+18x=1
x/2+x/6+x/12+x/20+x/30+x/42=1
x-10=4(x-28) 3(x-28)=x+56+28 2(1.5x-30-20)=x 2(2x-20-45)=x-1
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x