0.5x-3 0.04-x=0.4[0.5x-3] 0.5-搜答案-神马作文网

f(x)=｛x²,x≥0；{-x,x＜0.g(x)=｛1/x,x＞0,{-x,x≤0.(1)x≤0时,f（g(x))=f(-x)=(-x)^2=x^2.(2)x＜0时,g(f(x))=g(-

[x-x/(x+1)][(x+1)/(x^2+4x+4)][(x^2-4)/(x^2-2x)]=[x^2/(x+1)][(x+1)/(x+2)^2][(x+2)(x-2)/x(x-2)]=x/(x+2

当x≥1,f(x)=(x+1)lnx-x+1,f’(x)=(x+1)*1/x+lnx-1=1/x+1nx,因为x≥1,则lnx≥0,1/x>0,所以f’(x)>0,所以f(x)在[1,+oo）上递增,

3.2+x=4.6x=4.6-3.2x=1.4x-2.08=5.76x=5.76+2.08x=7.841.2x=0.84x=0.84÷1.2x=0.73x+0.5x=4.23.5x=4.2x=4.2÷

是求x的值么

6X-（360X-0.5X）=2×（360X-0.5X）6X-359.5X=2×359.5X(2×359.5+359.5-6)X=0X=0÷(2×359.5+359.5-6)X=0

当x=0时,f(x)不连续,故f(x)的原函数分成两部分：x>0,∫f(x)dx=∫x㏑(1+x^2)dx=(1/2)∫㏑(1+x^2)d(x^2)=(1/2)ln|ln(1+x^2)|+C1x

（X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问：请问X(X+2)=99解为什么就等于9了呢没看懂再答：换成算术法你就明

2x-1.4=4.8(1/8)x+1/16=3/472-4x=605x-0.2x=19.22x=4.8+1.4(1/8)x=3/4-1/164x=72-604.8x=19.22x=6.2(1/8)x=

x+0.5x=30

1.5x=30x=20再问：过程再答：x+0.5x=301.5x=30x=20

4X+0.5X=13.5X

9x=0x=0

原式=x^4(x+x^2+x^3+x^4)+x^8(x+x^2+x^3+x^4)+.+x^2000(x+x^2+x^3+x^4)=0+0+0+.0=0

f(x)=x,x≥0.f(x)=x+a,x

123!

再答：再问：还有，再答：

（3.6-1）x=3.252.5x=3.25x=1.312.5x-0.9x=52.211.6x=52.2x=4.5x-0.72x=0.3360.28x=0.336x=1.28x-0.5x=37.57.

∵X=-0.5∴(X-4)(x-2)-2(X-1)(X+3)=x²-6x+8-2(x²+2x-3)=x²-6x+8-2x²-4x+6=-x²-10x+

因x=0处f(x)没有定义,显然M不为0又因f(x)=log3(x)（x>0）为增函数f(x)=-log1/3(-x)（x

#includesintjiesheng(intn)//用于计算阶乘如：3!{if(n=1)rerunn;returnn*hh(n-1)}doubledigui(intn,intx)//用以计算y=x

2.2x-x=0.

2.2x-x=0.31.2x=0.3x=0.3/1.2x=1/4=0.25

x+x=x+15

2x等于x+15x等于15