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2 years ago

−1 − (−z) where z= -2

Mathematics

2 answers:

Tpy6a [65]2 years ago

6 0

Answer:

-3

Step-by-step explanation:

Stels [109]2 years ago

5 0

Answer: -3

Step-by-step explanation:

-1 - (--2)

-1 - 2

= -3

Whenever you see 2 negative , or - signs next to each other, like --, they cancel out.

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Step-by-step explanation:

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3 years ago

Consider the function f (x comma y )equals3 x squared minus 2 y squared minus 3 and the point (negative 2 comma 1 ). a. Find the

Dima020 [189]

Answer: see description

Step-by-step explanation:

given the function $f(x,y) = 3x^2-2y^2-3$

we calculate the gradient $\nabla f(x,y) = \frac{\partial f(x,y)}{\partial x} \hat{\textbf{x}}+ \frac{\partial f(x,y)}{\partial y} \hat{\textbf{y}} + \frac{\partial f(x,y)}{\partial z} \hat{\textbf{z}}$

for each term we consider all variables different to the one we are derivating as constants. For each term we have

$\frac{\partial f(x,y)}{\partial x} = 3 \frac{\partial }{\partial x}(x^2) = 6x\\ \frac{\partial f(x,y)}{\partial y} = -2 \frac{\partial }{\partial x}(y^2) = -4y\\\frac{\partial f(x,y)}{\partial z} = 0\\$