5(x-1.7)/(x+0.9)=3
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5(x-1.7)/(x+0.9)=3
5(x-1.7)/(x+0.9)=3
5(x-1.7)/(x+0.9)=3
5(x-1.7)=3(x+0.9)
5x-8.5=3x+2.7
5x-3x=2.7+8.5
2x=11.2
x=5.6
5X-8.5=3X+2.7
2X=11.2
X=5.6
采纳、
x等于2a分之负b加减根号下b方减4ac,于是x1=1.91,x2=-1.11
原式===> 5(x-1.7)=3(x+0.9)
===> 5x-8.5=3x+2.7
===> 5x-3x=2.7+8.5
===> 2x=11.2
===> x=11.2/2
===> x=5.6
5(x-1.7)/(x+0.9)=3
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
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