(a) Evaluate (2, 1) and (2.1, 1.05) and calculate z (b) Use the total differential dz to...
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(a) Evaluate ƒ(2, 1) and ƒ(2.1, 1.05) and calculate Δz
(b) Use the total differential dz to approximate Δz.
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f(x, y) = Y X
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After I graduated from Tianjin University of Science & Technology in 2002, I worked as a technician in a jointed adventure company which makes cable and electrical wire used in automobile. In 2005, I was admitted to study in the graduation school of DALIAN JIAOTONG UNIVERSITY, and received my Ms degree in 2008. Then I worked as a mechanical engineer in a vacuum container manufacturing company until the year when I went to study in the U.S in 2012. After I returned to China in 2016, I have been working as freelancer providing translation and homework helping services in different platform.
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