3.5x=10.5的解
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3.5x+2.6x=12.26.1x=12.2x=12.2÷6.1x=2
(2x-3)(x-三分之一)=3x的平方-(x+1)(x-1)2x²-3x-2/3x+1=3x²-x²+111/3x=0x=0
设X²+3X为Y;Y-8=20/Y;Y²-8Y-20=0;(Y-10)(Y+2)=0;Y=10或-2;所以:1:X²+3X=10,X=2或-5;2:X²+3X=
x(x^2-2)+2x^2(x+3)-3x(5x-7)=x(3x^2-9x+17)+2=>x^3-2x+2x^3+6x^2-15x^2+21x=3x^3-9x^2+17x+2=>2x=2x=1
10.5x+2x=20, 12.5x=20, &
【解法一】【解法二】5x(x+7)(x+4)=5x(x^2+11X)5x(x²+11x+28)-5x(x²+11x)=05x^3+55x^2+140x=5x^3+55x^25x(x
(X-3)平方-(X+3)*(X-3)=(X+1)*(X+2)-(X-1)*(X+4)x^2-6x+9-x^2+9=x^2+3x+2-x^2-3x+4-6x+18=66x=18-66x=12x=2
提出x得到:x*(1-1/2+1/2-1/3+1/3-1/4……+1/2008-1/2009)=2008接着:x*(1-1/2009)=2008最后:x=2009
x+3.5x=9.94.5x=9.9x=2.24.25x-x=4.553.25x=4.55x=1.410x-2.7x=58.47.3x=58.4x=86.8x+3.2x=10010x=100x=10
2x^2-5x-x^2-2x=x^2-6-7x=-6x=6/7
13再问:要过程再答:3.5✘+2.6✘=12.26.1✘=12.26.1✘÷6.1=12.2✘=2再答:这个是第二题再问:哦再问
x(x+3)-x(1-2x)=1+3x²x²+3x-x+2x²=1+3x²x²+3x-x+2x²-3x²=12x=1x=2分之1
当x<0或者x>2时,f(x)=x³-2x²,f'(x)=3x²-4x.当0<x<2时,f(x)=2x²-x³,f'(x)=4x-3x².当
解题思路:这类题型我没有找到思路,请收回金豆吧,很抱歉,学习快乐解题过程:同学您好:方程右边是x的0次方吗?若是,我还没有找到思路,请收回金豆吧,很抱歉,耽误了您的学习。
(x+1)/(x+2)+(x+6)/(x+7)=(x+2)/(x+3)+(x+5)/(x+6)(x+2-1)/(x+2)+(x+7-1)/(x+7)=(x+3-1)/(x+3)+(x+6-1)/(x+
(x+x)+(x-x)+(xx)+(x/x)=1002x+0+x²+1=100x²+2x+1=100(x+1)²=10²x+1=10或x+1=-10x=9或x=
/x/+2[x]+4[x]+8[x]+16[x]+58=0|x|+30[x]+58=0|x|=-58-30[x]因为-58-30[x]是整数,所以|x|也是整数,即X也是整数.又:|x|=-58-30
0.5x+12-0.8x=10.5;0.3x=1.5;x=5;