求(100k²-12)/(4k²+3)范围0

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求(100k²-12)/(4k²+3)范围0

求(100k²-12)/(4k²+3)范围0
求(100k²-12)/(4k²+3)范围0

求(100k²-12)/(4k²+3)范围0
(25-87/3)