①√3x(x-1)-√2(x-1)=0 ②(x-6)^2=6-x ③4(x-1)^2=25(x+1)^2 ④√2x(x+
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①√3x(x-1)-√2(x-1)=0 ②(x-6)^2=6-x ③4(x-1)^2=25(x+1)^2 ④√2x(x+1)=x+1 ⑤x^2-9=1/2(x^2-6x+9)
已知x为正数,且A=X^2-16,B=2X-8,试比较A与B的大小
我3点要交的,答出来,
已知x为正数,且A=X^2-16,B=2X-8,试比较A与B的大小
我3点要交的,答出来,
![①√3x(x-1)-√2(x-1)=0 ②(x-6)^2=6-x ③4(x-1)^2=25(x+1)^2 ④√2x(x+](/uploads/image/z/4043643-51-3.jpg?t=%E2%91%A0%E2%88%9A3x%28x-1%29-%E2%88%9A2%28x-1%29%3D0+%E2%91%A1%28x-6%29%5E2%3D6-x+%E2%91%A24%28x-1%29%5E2%3D25%28x%2B1%29%5E2+%E2%91%A3%E2%88%9A2x%28x%2B)
比较大小常用相减或相除
A-B=X²-2X-8=(X-1)²-9
当(X-1)²-9=0,即X=4时,A=B
当(X-1)²-9
A-B=X²-2X-8=(X-1)²-9
当(X-1)²-9=0,即X=4时,A=B
当(X-1)²-9
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
①√3x(x-1)-√2(x-1)=0 ②(x-6)^2=6-x ③4(x-1)^2=25(x+1)^2 ④√2x(x+
已知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
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1x+2x+3x+4x+5x+6x+7x…+99x=100