若当x→(1/2)+时,π-3arccosx~a(x-1/2)b,则a=________,b=________.

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问题 若当x→(1/2)时,π-3arccosx~a(x-1/2)b,则a=________,b=________.

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答案[*];1

解析,得x-3arccosx~[x-(1/2)],故a=,b=1.
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