16[x-1]²=225
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x+1/x=3x^2+1=3xx^2=3x-1x^4+3x^3-16x^2+3x-17=x^2(3x-1)+3x^3-16x^2+3x-17=6x^3-17x^2+3x-17=6x(3x-1)-17x
由条件式x+(1/x)=3两边乘以x得x^2-3x+1=0故x^4+3x^3-16x^2+3x-17=x^4-3x^3+x^2+6x^3-17x^2+3x-17=x^2*0+6x^3-18x^2+6x
解题思路:考察函数的概念及性质解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/include/re
是这样的:x^5+x^4=x^3(x^2+x)=(x^2+x)[(x^3-1)+1]=(x^2+x)(x^3-1)+x^2+x=[x(x+1)(x-1)](x^2+x+1)+x^2+x=(x^3-x)
x+1/x=3x^2+1=3xx^2=3x-1x^4+3x^3-16x^2+3x-17=x^2(3x-1)+3x^3-16x^2+3x-17=6x^3-17x^2+3x-17=6x(3x-1)-17x
题目有点问题,应是(x²+3x+1)/(4x²+6x-1)-(12x²+18x-3)/(x²+3x+1)=2(x²+3x+1)/(4x²+6
X-1=2/1X+4/1X+8/1X+16/1X+32/1X(1-1/2-1/4-...-1/32)x=11/32x=1x=32
解题思路:本题考查有关式子的变形问题,注意完全平方公式的应用解题过程:
2x(x-2)-6x(x-1)=4x(1-x)+16,2x2-4x-6x2+6x=4x-4x2+16,-2x=16,x=-8.
去分母:(X-2)^2=16+X^2-4-4X=8X=-2经检验是增根,∴原方程无解.
原式=(x^2-1)(x^2+1)````(x^16+1)=x^32-1
(x+1)(x-2)(x+3)(x-4)+16=0,(x²-x-2)(x²-x-12)+16=0(x²-x)²-14(x²-x)+24+16=0(x&
解题思路:先化简代数式,再把x²-5x=14代入进行计算解题过程:0最终答案:略
(1)x+3x=-164x=-16x=-4(2)16y-2.5y-7.5y=56y=5y=5/6(3)3x+5=4x+1-x=-4x=4(4)9-3y=5y+58y=4y=1/2
x/x(x-1)+2=2x/(x+1)1/(x-1)+2=2x/(x+1)x+1+2(x-1)(x+1)=2x(x-1)x+1+2x²-2-2x²-2x=0-x-1=0-x=1x=
再答:采纳哟
(x-2)/(x+2)=(x+2)/(x-2)+16/(x²-4)方程两边同时乘(x²-4)(x-2)²=(x+2)²+16x²-4x+4=x