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x÷x=2x,x是多少?

1=2x, x=0.5

2X÷X=: 在x不等于0时:2X÷X=2 x等于0时,算式是不成立的。

2x 2x³=2*x*x*x ,x³是三个x相乘的意思!

2x³÷x² =2x^(3-2) =2x^1 =2x

-x+3÷2x=x/2

(2x/x-2-x/x+2)÷x/x^2-4 =(2/x-2-1/x+2)÷1/x^2-4 =(2/x-2-1/x+2)×(x^2-4) =2/(x-2)×(x^2-4)-1/(x+2)×(x^2-4) =2(x+2)-(x-2) =2x+4-x+2 =x+6

x-2x/2-6÷(x-5/2-x-2) =x-x-6÷(-9/2) =-6*(-2/9) =4/3

(x3)²÷(-x)²+(-2x)³×(-x) =x^6÷x^2+2x^3×x =x^4+2x^4 =3x^4

(x+2)/(2x²-4x )÷ [(x-2)+(8x/(x-2)] = [(x+2)/2x(x-2 )]÷ [(x-2)^2+8x]/(x-2) = [(x+2)/2x(x-2 )]*[(x-2)/(x+2)^2] =1/x(x+2) x=√2 -1. 原式=1/x(x+2) =1/[(√2 -1)(√2 +1)] =1/(2-1) =1

原式=( x x-5 + x x-5 )? x 2 -25 2x = 2x x-5 ? (x+5)(x-5) 2x =x+5,解不等式①,得x≥-5,解不等式②,得x<6,∴不等式组的解集为-5≤x<6,取x=1时,原式=6.本题答案不唯一.

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