8.设 a=ln11/10, b=tan1/10 c=1/11:
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(1)a+b+c=ln11/10+tan1/10+1/11=ln11/10+tan1/10+10/110=ln11/10+tan1/10+(ln11-ln10)/110=ln11/10+tan1/10+(ln11-ln10)/ln11×ln11/110=ln11/10+tan1/10+ln10/110=ln11/10+tan1/10+10/110=ln11/10+tan1/10+1/11(2)a-b-c=ln11/10-tan1/10-1/11=ln11/10-tan1/10-10/110=ln11/10-tan1/10-(ln11-ln10)/110=ln11/10-tan1/10-(ln11-ln10)/ln11×ln11/110=ln11/10-tan1/10-ln10/110=ln11/10-tan1/10-10/110=ln11/10-tan1/10-1/11
咨询记录 · 回答于2023-02-04
8.设 a=ln11/10, b=tan1/10 c=1/11:
亲,请问你要问的问题是什么呢
(1)a+b+c=ln11/10+tan1/10+1/11=ln11/10+tan1/10+10/110=ln11/10+tan1/10+(ln11-ln10)/110=ln11/10+tan1/10+(ln11-ln10)/ln11×ln11/110=ln11/10+tan1/10+ln10/110=ln11/10+tan1/10+10/110=ln11/10+tan1/10+1/11(2)a-b-c=ln11/10-tan1/10-1/11=ln11/10-tan1/10-10/110=ln11/10-tan1/10-(ln11-ln10)/110=ln11/10-tan1/10-(ln11-ln10)/ln11×ln11/110=ln11/10-tan1/10-ln10/110=ln11/10-tan1/10-10/110=ln11/10-tan1/10-1/11