(1+X):(X+7)=3:5
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(1+X):(X+7)=3:5(1+X):(X+7)=3:5(1+X):(X+7)=3:5
(1+X):(X+7)=3:5
(1+X):(X+7)=3:5
(1+X):(X+7)=3:5
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x-
3/x-1=4/x 6/x+1=x+5/x(x+1)
(1)X-3/X-1+X²-2/(x-1)(X-7)=1+x-5/x-7 (2)2x-1/x+4-5=96/x²-16-1-3x/4-x
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8(2) 已知x+3/(x-2)^2=A/x-2 + B/(x-2)^2 ,求A和B的值.
方程 3x(7-2x)+5x(2x-1)=4x(x-3)+56
求和:Sn=1+3x+5x*x+7x*x*x+……+(2n-1)x^n-1 (x不为0和1)
x+1分之x+2减去x+3分之x+4=x+5分之x+6减去X+7分之x+8 (解方程)
*-----------------------------------------------*| 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 ||
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
若|x|=7,若|x|=0 则x= 5-3x²+5x-(2x²-3x) (X²-3x+1)(三分之二x²-5x-3)
(1)-4x+6=5x-3 (2) 1-3x=7x+4 (3)-2x-7x+5=3x-x-6 (4)-3x+3=1-x-4x (5)5x-3x+7=1-3x(6)-x+2+3x=4-2x
x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2
60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-25%)x=36 2x+30%x=9.2
1.(1/X-1 )-2=X^-3X/X^-12.(X/X+1)^+5(X/X+1)+6=03.(8(X^+2X)/X^-1)+ 3(X^-1)/X^+2x
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),求f’(1)
解下列方程1.(x-7)(x+9)+2x(x-5)=(3x-4)(x-1) 2.(x-3)(x+3)-(3x+1)²=8x(5-x)解下列方程1.(x-7)(x+9)+2x(x-5)=(3x-4)(x-1) 2.(x-3)(x+3)-(3x+1)²=8x(5-x)
(1)(5-x)/(x-4)+1/(4-x)=1(2)1/(x^3+2x^2+x) + 1/(x^2+2x+1) =5/(2^2+2x)(3)(1-x)/(1+x+x^2) + 6/(1-x)=7/(1-x)(4)52/(x-8)=48/x + 4/(x-26)