y=8-2x
y/x=(8-2x)/x=8/x-2
當(dāng)x=2時,y/x有最大值2；當(dāng)x=3時,y/x有最小值2/3
(a+p)/(b+p)-a/b=[b(a+p)-a(b+p)]/[b(b+p)]=p(b-a)/[b(b+p)]
∵0＜a＜b,p＞0
∴b-a＞0
∴(a+p)/(b+p)-a/b＞0
∴(a+p)/(b+p)>a/b
實數(shù)x,y滿足2x+y=8,當(dāng)2≤x≤3時,求y\x的最值
實數(shù)x,y滿足2x+y=8,當(dāng)2≤x≤3時,求y\x的最值
1 若0a/b
1 若0a/b
數(shù)學(xué)人氣：310 ℃時間：2020-03-23 10:30:26
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