www.fltk.net > 解方程:x/(x%2)+(x%9)/(x%7)=(x+1)/(x%1)+(x%8)/(...

解方程:x/(x%2)+(x%9)/(x%7)=(x+1)/(x%1)+(x%8)/(...

解: x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6) 因为x/x-2=(x-2+2)/x-2=1+2/x-2.其他类似。 即 1+2/(x-2)+1-2/(x-7)=1+2/(x-1)+1-2/(x-6) 1/(x-2)-1/(x-7)=1/(x-1)-1/(x-6) 可得-5/(x-2)(x-7)=-5/(x-1)(x-6) (x-2)(x-7)=(x-1)(x-6) 化简...

解答如下:

解:1、x-x/7-7-1/x=2,6x/7-1/x=9,6x²-7=63x 得:x=(63-√4137)/12或x=(63+√4137)/12 2、x/(x-7)-1/(7-x)=2,x+1=2*(x-7),x=15 3、x/(x-7)-7-1/x=2,x/(x-7)-1/x=9,x²-(x-7)=9(x²-7x),8x²-62x-7=0 x=(62-√4068)/16或x=(...

孩子是这么做的: 2(X+1.7)=9.2 左边去括号 2X+2*1.7=9.2 移项 2X=9.2-2*1.7 即2X=9.2-3.4 2X=5.8 X=2.9

解: x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6) 1+2/(x-2)+1-2/(x-7)=1+2/(x-1)+1-2/(x-6) 1/(x-2)-1/(x-7)=1/(x-1)-1/(x-6) 1/(x-2)+1/(x-6)=1/(x-1)+1/(x-7) (2x-8)/(x^2-8x+12)=(2x-8)/(x^2-8x+7) 由于x^2-8x+12不等于x^2-8x+7 因此,只...

1/(X-7)+1/(X-1)=1/(X-6)+1/(X-2) 1/(X-1)-1/(X-2)=1/(X-6)-1/(X-7) -1/(X-1)(X-2)=-1/(X-6)(X-7) (X-1)(X-2)=(X-6)(X-7) X^2 -3X+2=X^2 -13X+42 10X=40 X=4 经检验,X=4是方程的解 如果帮到您的话,可以好评吗?谢谢了!!!(右上角采纳

您好: √7(1+x)/(√7+√2)+√2/(√7-√2)=0 √7(1+x)/(√7+√2)=-√2/(√7-√2) 1+x=-√2(√7+√2)/√7(√7-√2) 1+x=-(√14+2)/(√7-√14) 1+x=-(√14+2)(√7+√14)/(7-14) 1+x=(7√2+2√7+14+2√14)/7 1+x=√2+2/7√7+2+2/7√14 x=√2+2/7√7+1+2/7√14 不明白,可以追问 如...

3分之2-x+7分之1=14分之9 x=2/3+1/7-9/14 x=2/3-(9/14-2/14) x=2/3-1/2 x=1/6 如有帮助,记得采纳,谢谢 祝学习进步!

(1)x×(1- 4 9 )= 5 6 , 5 9 x= 5 6 , 5 9 x× 9 5 = 5 6 × 9 5 , x= 3 2 ;(2)x+ 7 9 x=2, 16 9 x=2, 16 9 x× 9 16 =2× 9 16 , x= 9 8 ;(3)11x-50%=1611x-50%+50%=16+50%, 11x=16.5, 11x÷11=16.5÷11, x=1.5;(4)(x+ 2 7 )...

(1)x÷ = x= (2)x: = : x= (3) x×30%= x= (4)7×(x+5)=49 x=2

网站地图

All rights reserved Powered by www.fltk.net

copyright ©right 2010-2021。
www.fltk.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com