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  2. How can I graph $x + y + z = 1$ without using graphing devices? I equal $z = 0$ to find the graph on the xy plane. So I got a line, $y = 1-x$ But when I equal 0 for ...

  3. What I usually do is break a three-dimensional graph up into three separate planes, X-Y, X-Z, Y-Z, and I draw them individually and try to visualize how they fit together.

  4. y^2 = x^2 + z^2 has the form of an equation for a circle. So, you are stacking, in the y direction, circles of increasing radius, one on top of the other. Share

  5. Proof for a graph distance - Mathematics Stack Exchange

    math.stackexchange.com/questions/737487/proof-for-a-graph-distance

    For Graph G G, there are several (x, y) (x, y) -paths; the shortest among them have length 2 2. Thus d(x, y) = 2 d (x, y) = 2. Prove that graph distance satisfies the triangle inequality. That is, if x, y, z x, y, z are vertices of a connected graph G G, then d(x, z) ≤ d(x, y) + d(y, z). d (x, z) ≤ d (x, y) + d (y, z).

  6. logic - Boolean Algebra: Simplifying $\;xyz + x'y + xyz'$ -...

    math.stackexchange.com/questions/1187094/boolean-algebra-simplifying-xyz-xy-xyz

    Using the distributive property (first method), we get: xyz +x′y + xyz′ = xy(z +z′) +x′y = xy +x′y = (x +x′)y = y. You erred when you went from y(z +x′ +z′) to yx′. You should have. y((z +z′) +x′) = y(1 +x′) = y ⋅ 1 = y. Share. Cite. edited Mar 13, 2015 at 16:09. answered Mar 12, 2015 at 17:36.

  7. I don't understand why the graph of a cylinder is $x^2 + y^2 = r$

    math.stackexchange.com/questions/4587440/i-dont-understand-why-the-graph-of-a...

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  8. What is the relationship between the functions $f(x,y,z) =...

    math.stackexchange.com/questions/2237692/what-is-the-relationship-between-the...

    Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

  9. Find a possible equation for the linear function g(x,y) shown in...

    math.stackexchange.com/questions/716355/find-a-possible-equation-for-the...

    From this picture, you can visually estimate the partial derivatives with respect to y and to x. With the partials, you can find the equation of a plane that satisfies the initial condition g(0,0) = -3

  10. The method used in your second link seems appropriate—the direction vector of the tangent line at any point on $\langle x(t),y(t),z(t)\rangle=\langle\cos t,\sin t,t\rangle$ is $\langle x'(t),y'(t),z'(t)\rangle=\cdots$ (no partial derivatives needed) and you know a point on the line, so you can write a parametric equation for the tangent line.

  11. But when the region is a rectangle, as in this case, it's even easier. The sides of the rectangle are your bounds. No need to graph anything, Just evaluate $$\int_1^2 \int_0^1 x^2+y \, dx\,dy = \int_1^2 1/3+y\,dy =11/6 $$ If you do want to visualize the graph, just picture that portion of the quadriceps surface over the rectangle in question.