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设a,b为大于1的正数,并且,如果的最小值为m,则满足的整点的个数为 ( ) ...

 设ab为大于1的正数,并且6ec8aac122bd4f6e,如果6ec8aac122bd4f6e的最小值为m,则满足6ec8aac122bd4f6e的整点6ec8aac122bd4f6e的个数为                                    (     )

A.5                    B.7                    C.9                   D.11

 

A 【解析】,,当且仅当a=4,b=2时,取“=”.所以m=6. 所以.满足此不等式的整点有(0,0),(0,1),(0,-1),(-1,0),(1,0),(1,1),(-1,-1)共7个.
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