5.4x-1.4xdy24
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5.4x+x=12.86.4x=12.8x=12.8/6.4x=2
lim(x→∞)(x^2+x)/(x^4-3x^2+1)(上下除以x^4)=lim(x→∞)(1/x²+1/x³)/(1-3/x²+1/x^4)=0
13.2x+9x=33.322.2x=33.3x=1.58x-3x=1055x=105x=215.4x+x=12.86.4x=12.8x=2x-0.36x=160.64x=16x=25
原式等于2.4x=360x=150
13.2x+9x=33.38x-3x=105(13.2+9)x=33.3(8-3)x=10522.2x=33.35x=10522.2x÷22.2=33.3÷22.25x÷5=105÷5x=1.5x=2
解;化简:2.4X=108两边同除以2.4得:X=45解得原方程的解为X=45∴原方程的解为X=45
6.4=1.4×-×6.4=0.4××=6.4÷0.4×=16
1.4(x+5)(x+6)(x+10)(x+12)-3x^2=4*[(x+5)(x+12)][(x+6)(x+10)]-3x^2=4*(x^2+60+17x)(x^2+60+16x)-3x^2=4*[
5.4x1x=12.86.4x=12.8x=12.8\6.4x = 2
x=9.8/(1.4-1)=24.5
4x×0.9=x+523.6x=x+523.6x-x=522.6x=52x=52÷2.6x=20不懂可追问,有帮助请采纳,谢谢!再问:抱歉我打的是1.4x不是4x再答:4x×0.9=x+521.26x
13.2x+9x=33.322.2x=33.3x=1.58x-3x=1055x=105x=215.4x+3x=12.88.4x=12.8x=1.5238x-0.36x=160.64x=16x=25再问
(2.4-1.4-3)x=-2.8-2x=-2.8x=1.4再答:求采纳
再答: 再问:还有,再答:
再答: 再答: 再答: 再问:错了再答:哪题?再答:哪题错了?
第二个是再答:5x=105
5.4x+x=12.86.4x=12.8x=2
5.4x+6.6x=19.212X=19.2∴X=19.2÷12=1.6