1/4x+8=80%x
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1/4x+8=80%x1/4x+8=80%x1/4x+8=80%x1/4x+8=80%x0.25x-0.8x=-8-0.55x=-8x=160/110.25x+8=0.8x8=0.8x-0.25x8=
1/4x+8=80%x
1/4x+8=80%x
1/4x+8=80%x
1/4x+8=80%x
0.25x-0.8x=-8
-0.55x=-8
x=160/11
0.25x+8=0.8x
8=0.8x-0.25x
8=0.55x
x=8/0.55
x=160/11(这是一个分数)
1/4x+8=80%x
80%x-1/4x=8
0.55x=8
x=160/11
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
x-1/4x+8=80%x
1/4x+8=80%x
1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做
1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少
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如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值,
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3
x-2/x-1+x-8/x-7=x-4/x-3+x-6/x-5
(X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7)
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x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7