For how many positive integers m ≤ 100 is (m -5)(m -45) positive?A、45B、50C、58

游客2025-02-24 35

问题 For how many positive integers m ≤ 100 is (m -5)(m -45) positive?

选项 A、45
B、50
C、58
D、59
E、60

答案 D

解析

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Forhowmanypositiveintegersm≤100is(m-5)(m-45)positive?A、45B、50C、58