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Let ?(?, ?) = ??2 + ln(??). 1. Write the equation of the tangent plane to...

Let ?(?, ?) = ??2 + ln(??).

1. Write the equation of the tangent plane to the surface at (1, 1).

2. If ?(?,?)=?^(2?+?) and ?(?,?)=?+?,find ??/?u and ??/?v if ?=1 and ?=−2.

3. In what direction would ??⃑ (1, 1) be steepest? What is that value?

Math   Calculus   
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