Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the independent variables. Simplify the results. f ( x , y ) = 2 x + y 2 (a) f ( x + Δ x , y ) − f ( x , y ) Δ x (b) f ( x , y + Δ y ) − f ( x , y ) Δ v
Evaluating a Function In Exercises 9-20, evaluate the function at the given values of the independent variables. Simplify the results. f ( x , y ) = 2 x + y 2 (a) f ( x + Δ x , y ) − f ( x , y ) Δ x (b) f ( x , y + Δ y ) − f ( x , y ) Δ v
Solution Summary: The author explains how to determine the function at a given value of independent variables.
Testing for Functions RepresentedAlgebraically In Exercises 11–18,determine whether the equation represents yas a function of x.11. x2 + y2 = 4 12. x2 − y = 913. y = √16 − x2 14. y = √x + 515. y = 4 − ∣x∣ 16. ∣y∣ = 4 − x17. y = −75 18. x − 1 = 0
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