:x×(1-50%)=(1000-x)×(1-25%)怎样
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:x×(1-50%)=(1000-x)×(1-25%)怎样:x×(1-50%)=(1000-x)×(1-25%)怎样:x×(1-50%)=(1000-x)×(1-25%)怎样x×(1-50%)=(10
:x×(1-50%)=(1000-x)×(1-25%)怎样
:x×(1-50%)=(1000-x)×(1-25%)
怎样
:x×(1-50%)=(1000-x)×(1-25%)怎样
x×(1-50%)=(1000-x)×(1-25%)
0.5x=0.75(1000-x)
乘以4得 2x=3000-3x
5x=3000
x=600
x*(1-50%)=(1000-x)*(1-25%)
x*50%=(1000-x)*75%
0.5X=750-0.75X
1.25X=750
X=600
设第一瓶水重x克,那么第二瓶水重1000-x克由此得:x×(1-50%)=(1000-x)×(1-25%) 解得:x=600克那么第一瓶水重600克,第二瓶水重400克
50x(x-1)+60x(x-4)=5100
(x+1)+(x+2)+(X+3).+(x+50)=1325
X(X-1)=X
x+ x+(x*50%)=1.5X?
x>=1,x
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
设f(x)=x(x-1)(x-2).(x-1000) 则f'(0)=?RT
Fx=x(x-1)(x-2)(x-3)…(x-1000) 求 F'(0)
x*x*x*x+2008x*x+2007x+2008(提示:x*x*x-1=(x-1)*(x*x+x+1))
x/x平方-x+2=2x/x+1
(X+1)X(X+2)X(X+3)=504
一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X
50X+(50-5)(X+1)=425,x=?
=(x^2-5x)^2+10(x^2-5x)+24 =x^4-10x^3+25x^2+10x^2-50x+24 这是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=(x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24
=(x^2-5x+4)(x^2-5x+6) =(x^2-5x)^2+10(x^2-5x)+24 是怎么转化的(X-1)(X-2)(X-3)(X-4) =(X-1)(X-4) (X-2)(X-3)=(x^2-5x+4)(x^2-5x+6)=(x^2-5x)^2+10(x^2-5x)+24=x^4-10x^3+25x^2+10x^2-50x+24=x^4-10x^3+35x^2-50x+24不好意思我弄错了,是=(x^2-5
x/40+x/50=1+1/200*x
80%X*(1+50%)=10+X 求X是多少?