3分之一X 35=0.5X
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x的立方-x的立方分之一=(x-1/x)(x²+1/x²+1)=3×((x-1/x)²+2+1)=3×(9+3)=36;很高兴为您解答,skyhunter002为您答疑解
即1/(x+10)+1/(x+1)-1/(x+2)+1/(x+2)-1/(x+3)+……+1/(x+9)-1/(x+10)=2所以1/(x+1)=2x+1=1/2x=-1/2
x-1/x=3(x-1/x)^2=x^2+1/x^2-2=3*3=9x^2+1/x^2=9+2=11
x^2+1/x^2=(x-1/x)^2+2=3^2+2=9+2=11
若5x^2-3x+5=0因为5X^2-3X+5=0所以5X^2=3X-5代入5x^2-2x-1/(5x^2-2x+5)得:X-5-1/X通分得:(X^2+5X-1)/X又因为5X^2-3X-5=0所以
因为x-(1/x)=3所以[x-(1/x)]²=3²x²+(1/x²)-2×x×(1/x)=9x²+(1/x²)-2=9所以x²+
x+20%x=3601.2x=360x=300x+50%x=0.751.5x=0.75x=0.53分之一x-4分之一x=24分之一1/12x=1/24x=1/2x-35%x=3900.65x=390x
(x+2)(x+3)=-4无解,化开得(x+5/2)^2+13/4=0(x^2)/6-0.5x-1/3=0,两边同乘6,x^2-3x-2=0(x-1)(x-2)=0,x=1或x=2根号3)x^2-x+
1/x(x+3)+1/(x+3)(x+6)+1/(x+6)(x+9)=3/2(x+9)(1/3)×[3/x(x+3)+3/(x+3)(x+6)+3/(x+6)(x+9)]=3/2(x+9)(1/3)[
x+x分之一=3两边平方:x²+1/x²+2=9x²+1/x²=9-2=7
您好:x-5分之一+x分之一=6分之一两边乘6x(x-5)6x+6(x-5)=x(x-5)6x+6x-30=x²-5xx²-17x+30=0(x-2)(x-15)=0x1=2x2=
1/x+5+1/x+8=1/x+6+1/x+71/x+5-1/x+6=1/x+7-1/x+8(x+6)/[(x+5)(x+6)]-(x+5)/[(x+5)(x+6)]=(x+8)/[(x+7)(x+8
x:12=0.5:3分之13分之1x=12×0.53分之1x=6x=6×3x=18很高兴为您解答,【学习宝典】团队为您答题.请点击下面的【选为满意回答】按钮.
1/x(x+1)+1/(x+1)(x+2)+.+1/(x+8)(x+9)=(2x+3)/x(x+9)1/x-1/(x+1)+1/(x+1)1/(x+2)+.+1/(x+8)-1/(x+9)=(2x+3
x+x分之一=3(x+1/x)²=9x²+1/x²+2=9x²+1/x²=7
再答:望采纳
(1)方程的解x-7分之一+x-1分之一=x-6分之一+x-2分之一(x-7)分之一-(x-2)分之一=(x-6)分之一-(x-1)分之一(x-7)(x-2)分之5=(x-6)(x-1)分之5(x-7
x²+1/x²-3(x+1/x)+2=0(x+1/x)²-3(x+1/x)=0(x+1/x)(x+1/x-3)=0x+1/x=0x²=-1(舍去)x+1/x-3
f(x-1/x)=x²+1/x²=x²-2+1/x²+2=(x-1/x)²+2所以f(x)=x²+2故f(3)=3²+2=11答案
6X=3X15X=45/6X=7.575X减3X=1572X=15X=15÷72X=5/247X=25X35X=25X35÷7X=12554X=34X2X=68/54X=34/2712X=23X14X