LM2020-02-27 17:33:18
LMHi Mr. Liang, may I if the formula you used is correct? If so, please advice the formula being introduced in the lecture.
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Adam2020-02-27 19:03:31
Adam同学你好，是对的
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Please double check, the answer of your formula and substitutions is -5.11546819
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deltaP=P1-P0=-5.11546819
P1=P0+deltaP=55.37--5.11546819=50.25453181约等于50.26
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