（x-7)x7 =(x-11)x11 怎么解方程?

（x-7)x7 =(x-11)x11 怎么解方程? 2X/1x3+2X/3x5+2X/5x7+2x/7x9+2x/9x11=10 x=? (1-1/2x4)x(1-3/3x5)x(1-5/4x6)x(1-7/5x7)x(1-9/6x8)x(1-11/7x9)x(1-13/8x10)x(1-15/9x11) 3.236x(-7)+(-3.264)x7-(-2.5)x7 2/3+2/3x5+2/5x7+2/7x9+2/9x11+2/11x13=? 1/1x3+1/3x5+1/5x7+1/7x9+1/9x11+1/11x13= matlab 解多元一次方程组X1=1000+X2/2 X2=X1+X3/2 X3=X2+X4/2 X4=X3+X5/2X5=X4+X6/2 X6=X5+X7/2 X7=X6+X8/2 X8=X7+X9/2X9=X8+X10/2 X10=X9+X11/2 X11=X10+X12/2 X12=X11+X13/2X13=X12+X14/2 X14=X13+X 5一3x7/9= 4/11+2/11x11/6= 能简算要简算 1/5x7+1/7x9+1/9x11+1/11x13+…+1/23x25 1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=? 1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=? 1/1x4+1/4x7+1/7x11+*******1/97x100=?*是省略号 1x4+4x7+7x11+……+n(n+3)=?分解因式啊~~~ 1.5x+20=14x-612.2x-2=10x-663.9+12X = 119+X4.3x+12=75-6x5.76-4x=7x+216.-32 - 5x=13-10x7.152-4x= 6x+228.2x+10 = -90-8x9.-151-9x=10x+2010.10-9x= 135-44x11.250-7x=38x+15 因式分解:X15+X14+X13+X12+X11+X10+X9+X8+X7+X6+X5+X4+X3+X2+X+1= ( x^14 )( x + 1 ) + ( x^12 )( x + 1 ) +……+ x( x + 1 ) + ( x + 1 )= ( x + 1 )[ ( x^14 + x^12 ) + ( x^10 + x^8 ) + ( x^6 + x^4 ) + x + 1 ]= ( x + 1 )[ ( x^12 )( x + 1 ) + ( x^8 )( 在以太网帧中使用CRC校验码,其生成多项式是A.G(X)=X16 +X12 +X5 +1 B.G(X)=X16 +X15 +X2 +1 C.G(X)=X12+X11+X3+X2+X+1 D.G(X)=X32+X26+X23+X22+X16+X12+X11+X10+X8+X7+X5+X4+X3+X+1能给我解析下吗? 1.1x3.3x5.5x7.7x9.9x11.11x13.13x15.15x17.17x19.19=多少 简便计算.7/8x11/9+87.5%x7/9