Dada a função de duas variáveis f( x, y) = 3+√x-y, o valor de f (2,-2) é: A) 0 B) 2 C) 3 D) 5 E) 1.... Pergunta de ideia deWerbeth95

Werbeth95 @Werbeth95

November 2019 1 141 Report

Dada a função de duas variáveis f( x, y) = 3+√x-y, o valor de f (2,-2) é:
A) 0
B) 2
C) 3
D) 5
E) 1

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avengercrawl Olá

Resposta correta, letra D) 5

Basta substituir a função no ponto (2, -2)
x = 2
y = -2

$\mathsf{f(x,y) ~=~3~+ ~ \sqrt{x~-~y} }\\\\\mathsf{f(2,-2) ~=~3~+ ~ \sqrt{2~-~(-2)} }\\\\\mathsf{f(2,-2) ~=~3~+ ~ \sqrt{2~+~2} }\\\\\mathsf{f(2,-2) ~=~3~+ ~ \sqrt{4} }\\\\\mathsf{f(2,-2) ~=~3~+ ~2~}}\\\\\boxed{\mathsf{f(2,-2) ~=~5 }}$

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