📘 multivariable calculus

1. **Problem Statement:** Investigate the existence of limits for various functions as $(x,y) \to (0,0)$ using path tests and polar coordinates, analyze continuity, and interpret g

1. We are given four functions and asked to find and sketch their domain, range, level curves, and region properties. 2. Let's analyze each function one by one.

1. The problem asks to find and sketch the domain of each function given. 2. The domain of a function $f(x,y)$ is the set of all points $(x,y)$ for which the function is defined.

1. **Problem Statement:** Analyze the functions for domain, range, level curves, boundary, and domain properties. ---

1. The problem is to understand and describe the surface defined by the equation $x=0$ in $\mathbb{R}^3$. 2. The equation $x=0$ represents all points in three-dimensional space whe

1. **Problem statement:** We have the function $$F(x_1, x_2) = 8x_1^{0.76}x_2^{0.12}$$ and the point $$a = (8, 3)$$. We want to find the exact change in $$x_2$$ when $$x_1$$ decrea

1. **Stating the problem:** We need to find the conditional extrema (maximum or minimum) of the function $$f(x,y) = 2x^2 - xy$$ subject to the constraint $$u(x,y) = 2x + 2y - 2 = 0

1. **Problem statement:** Calculate the double integral $$\iint \frac{xy}{\sqrt{x^2 + y^2}} dA$$ over the region defined by $$x^2 + y^2 = 1$$ (the unit disk). 2. **Formula and appr

1. **Problem Statement:** (a) Convert points A(2,2,1) and B(5,5,4) from Cartesian $(x,y,z)$ to cylindrical coordinates $(r,\theta,z)$ where $r=\sqrt{x^2+y^2}$ and $\theta=\tan^{-1}

1. **Problem Statement:** Convert points A(2, 2, 1) and B(5, 5, 4) from Cartesian to cylindrical coordinates and analyze their components. 2. **Formula for Cylindrical Coordinates:

1. The problem is to identify the geometric objects represented by the given equations and describe their orientation relative to the coordinate axes. 2. (a) Equation: $z = -1$

1. **Problem 44:** Find the solid cylinder that lies on or below the plane $z=8$ and on or above the disk in the $xy$-plane with center the origin and radius 2. 2. **Step 1:** Stat

1. **State the problem:** Find and classify the extrema of the function $F(x,y) = 2x^2 + 10xy + 3y^2$ on the boundary of the circle $x^2 + y^2 = 5$. 2. **Method:** Use Lagrange mul

1. The problem is to analyze the parametric vector function $$\mathbf{r}(t) = (-\sin(t), -\cos(t), 2t)$$ for $$-2 \leq t \leq 2$$. 2. This function describes a curve in 3D space wh

1. Problem statement: Change the order of integration of the given double integral. 2. The integral to be converted is

1. Let's start by understanding double integrals in polar coordinates. 2. The problem: Convert a double integral from Cartesian coordinates $(x,y)$ to polar coordinates $(r,\theta)

1. The problem is to understand double integrals in polar coordinates and triple integrals in cylindrical coordinates. 2. Double integrals in polar coordinates are used to integrat

1. **State the problem:** We are given the surface equation $$z = -2y^2 - x^2 + 54$$ and boundary planes $$x = 3$$ and $$y = 3$$. We want to understand the shape and behavior of th

1. **State the problem:** We are given the surface defined by the equation $$z = -2y^2 - x^2 + 54$$ and two planes $$x = 3$$ and $$y = 3$$.

1. **State the problem:** We are given the function $$f(x,y) = x^4 + y^4 + 4xy$$ and we want to analyze or work with it. 2. **Understand the function:** This is a function of two v

1. Masalah: Tentukan luas permukaan dari permukaan $z = x^2 + 2y$ di atas segitiga $T$ dengan titik sudut $(0,0)$, $(1,0)$, dan $(1,1)$.\n\n2. Rumus luas permukaan permukaan $z = f