(98 x)÷(162 x)=0.618解法-搜答案-智慧作业帮

1X+2X+3X…+98X+99X+100X=5050x=50500x=10

x^4+x^3+x^2+x+1=0,x^100+x^99+x^98+x^97+x^96=x^96(x^4+x^3+x^2+x+1)=x^96*0=0

因为x^4+x^3+x^2+x^2+1=0所以x^100+x^99+x^98+x^97+x^96=x^96(x^4+x^3+x^2+x^2+1)=x^96*0=0

x^100+X^99+X^98+X^97+X^96=x^96(x^4+X^3+X^2+X^1+1)=k^96*0=0

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(-

原式=(3x²+3x-x²+x)/(x+1)(x-1)*x(x²-1)/x²(x²-4)=(2x²+4x)/(x+1)(x-1)*(x+1)

1/x(x+1)(x+2)+1/(x+1)(x+2)(x+3).+1/(x+98)(x+99)(x+100)=(1/2){[1/x(x+1)-1/(x+1)(x+2)]+[1/(x+1)(x+2)-1

提公因式法吧x^97+x^98+x^99+x^100+x^101+x^102+x^103=x^97(1+x+x^2+x^3+x^4+x^5+x^6)因为1+x+x^2+x^3＝0所以原式＝x^97(x

56÷X=0.

0.8*X=56X=56/0.8X=70

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

原式=2x(x-2)/(x+2)×x(x+2)/(x-2)²×3(x-2)/x=6x当x=√3/2时原式=3√3

先一个一个的展开括号项,再同项合并就行了啊[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x=[xx-xy-(xy-yy)+x(x-y)+y(x-y)]÷2x=[xx-xy-xy+yy+xx-

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

x²-2x-3=0(x+1)(x-3)=0x=-1或x=3当x=-1时(x-1)分之(x²-3)÷(x-1)分之1=(x-1)分之(x²-3)×(x-1)=x²

f(x)=x,x≥0.f(x)=x+a,x

123!

再答：再问：还有，再答：

98-8x=298x=98-298x=69x=69/81.6÷(x-0.45)=32x=0.54x+160÷20=128x=30(x-3.5)×2=14x=10.5x÷0.2=4.75÷7.125x=

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