设ƒ(x)在[a,b](a﹤b)上连续且单调减少,则ƒ(x)在[a,b]上的最大值是()

设ƒ(x)在[a,b](a﹤b)上连续且单调减少,则ƒ(x)在[a,b]上的最大值是()

A.ƒ(a)

B.ƒ(b)

C.ƒ[(a+b)/2]

D.ƒ[(b+2a)/3]

正确答案是A

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