100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Summary Advanced Calculus Mathematics 214 CA$15.85   Add to cart

Summary

Summary Advanced Calculus Mathematics 214

 76 views  4 purchases
  • Course
  • Institution
  • Book

Digitally summarised advanced calculus for Mathematics 214 Stellenbosch University. These notes are detailed and comprehensive to assist you in your studies. Detailed theory and examples included. Textbook used: Calculus: Early Transcendentals (Daniel K. Clegg, James Stewart, and Saleem Watson) ...

[Show more]

Preview 4 out of 89  pages

  • No
  • 13, 14, 15, 16
  • June 24, 2023
  • 89
  • 2022/2023
  • Summary
avatar-seller
advanced calculus

12.6. Cylinders and quadric surfaces




cylinders
A cylinder is a surface that consists of all lines (called rulings) that are parallel to a given line and pass
through a given plane curve.




Sketch the the surface x
e.g. graph of z =




does notinvolve
equation y
·




·

any vertical plane with
equation y = K intersects the


graph in the curve moves
->

parallel along xz-plane
·
surface name: parabolic cylinder
rulings of cylinder parallel to
y-axis
·
are




if variable the surface is
rulings parallel to * one
(/y(z) is
missing, a


y-axis and
pass cylinder
through curve




e.g.(2 y2 + 1
=




·
circle with radius 1(z
of =k)

·

parallel to
cy plane

2
5.9.y2 z
+
1
=




radius k) NB:both these
circle with of 1(x
equations representa cylinder,
·
*
=




parallel this cylinder is
to
yz-plane Not
a circle. The trace of
·




a circle with z 0.
=

, surfaces,
quadric have the same characteristics as conic sections



A quadric surface is the graph of a second-degree equation in three variables x, y, and z. The
most general such equation is:


* Ax2
By (z2 Dxy Eyz fxz 6x Hy Iz 5 0
+
+
+ + + + +
+ + =




where A-5 are constants, butby translation and rotation can be boughtinto
I standard forms:



I
Ax2 Byz (z 2 5 0 or where C
A, B, O
· + +
=
+
=




Ax2 By2 Iz 0
+
· + =




e.g. Use traces to sketch the
quadric surface:( + YE +

=




· substitute z 0 = trace
=> in cy plane is x+
Y 1)
=

Ellipse
Horizontal in z K is:
trace plane
·
=




x2 y) 1
k2; z
k) ellipse provided 1
k 0 -> 12 4
- -

<
+ =
=




9 ↳
-> -
2<k < 2


and ellipses:
·vertical traces
parallel to
yz xz
planes are also


y2 z
+
1
=
-



k2;x kif = -
1ckx )

9 H




x2 z2 k2 if 3xk< 3
1
i( k
-

t
-
=
=




4 4

Z vertical:yz Z vertical:xz
Y Horizontal:
M xy M M


3 2


2




>x
>x
-y
C C C
- I I -
3 3 -
I I




-
2
-
3
2

W W W




combine these form ellipsoid (all in IR5:
we can traces to an 3 traces are
ellipses)


s
each trace is symmetric to each coordinate plane,
because there are only even
powers of and Z
x, y

, surface:(another def.)
TRACE
ofa
quadric
curve obtained by taking an intersection a
of
plane parallel to a coordinate plane (cy/zy/yz
plane) and the surface.
quadric

e.g. Determine the shape of the surface

[(1,4,z) G(R3: y2
+



z)
=




solution set



solution

① Find the traces where z =

K, KEIR Horizontal trace:Ellipse

vertical trace:Parabola


consider?+Y=K in a
plane (2D) <
Elliptic parabaloid

obtain solutions. know itdoes the
If
so, we no
So, we cross
not
negative Z axis.

k
If 0,x y
=
=
0
=
is the
only solution. y
a

If k >0:x2 yz
+ k
=


cy-plane
16


x2 k gets larger, ellipse
Y
- + =I AS

16k grows
I




() x2 +
y2 = j >x
L
I
(4) (r)
2
0
-
L

~
I




How does the ellipse grow? N

2
xz
plane x
y2 z
+ =
-




M
k2 = 116
k1
plane Z =




yz
-


A
N A
1 Set K
a y
=




Let x
k,
= then if k 0
=




z x2
2
1
y2
+
z
= =
I0 =




16 16
R
k 'x
=
ak 0 =
L -
>x
R

ifk 0
=




..
2 W
z
y
=




if k 1
=

↑ ·

=z
i y
+




W




c

, revision ofconic sections (10.5)

intersection a
of cone with a plane

⑪se
x2 + y2 = I a vertices: I a

92 b2
and Ib




⑭erbola xand
(*and-y:
+
y:
-




3
x -
1
=
>vertices: I a

92
assymptotes: x x




⑳bola
=
x2 OR Y2:AKI OR c2 =


dy>
b2
a = Lip
focus




Use traces to sketch z 4x2 yz
e.g.
+
=




·
substituting =
0, we
get: y2 = z


the
Thus, a
parabola parallel to
ccy-plane
·
FOr x K: =




z
412 z slice the parallel the yz-plane,
y => if we
graph with
any plane
to
+




2
=




yZ
have direction.
we a
positive parabola opening up in the upward
FOr y K:

xz/z
=




=4x + k2
parabola
= that
opens upward (steeper)
·
FOr z K:
=




cy( y2 4=
+ k ellipse
=
iff k>0




e.g.



·
fOr
Sketch




x K:
=
z
yz
=
-




FOr
x2




z K!= FOr
y K:
=
-pr
z =
yz
-

k2 k yz
=
-
x2 z x2
=
-
x2


42
a A xy xZ
yperbolic paraboloid

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller miaolivier16. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$15.85. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

77254 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$15.85  4x  sold
  • (0)
  Add to cart