Mathematics, 01.05.2021 20:00 honeybaby675610
Find the domain of the functions defined by the following formulas, and then draw these domains in the xy-plane. Write explicitly if boundaries and corners are included or excluded (write it down, or show it on the picture, for instance, use dashed lines / hollow circles for excluded, solid lines / full circles for included). Explain clearly what you do. Be careful with signs and inequalties.
1. f(x, y) = (1 β xy.)^1/2
2. g(x, y) = (y β 2x^2)^1/2 ln(1 β y).
3. h(x, y) = (x^2 + y^2 β 1)^1/2/(8 β x^2 β y^2 + 2y)^1/2
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Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%
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