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- B.<IMG src="//img1.yqda.net/question-name/73/9207cac97e19ff9ac127d916ad0a64.jpg">
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- A.-5e<SUP>2-5x</SUP>dx
- B.-e<SUP>-5x</SUP>dx
- C.e<SUP>-5x</SUP>dx
- D.5e<SUP>-5x</SUP>dx