If \( ab \) and \( k0 \), then which one of the following is true?
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If \( ab \) and \( k0 \), then which one of the following is true?
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(1) \( \frac{a}{k^{2}}\frac{b}{k^{2}} \)
(2) \( \frac{a}{k}\frac{b}{k} \)
(3) \( k ak b \)
(4) \( k^{2} ak^{2} b \)
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