Let 13 be the surface with the equation given by 4x²-9y²= 9(z²+4)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.4: Plane Curves And Parametric Equations
Problem 33E
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Question

View l3 as a surface of revolution, find an equation of a generating curve on the xy plane which, if revolved around the x axis, will result in l3

Let 13 be the surface with
the equation given by
4x²-9y²= 9(z² + 4)
2
2
Transcribed Image Text:Let 13 be the surface with the equation given by 4x²-9y²= 9(z² + 4) 2 2
geven,
2
47²-9y² = 9(2²+4)
• TRACE ON TY PLANE:
Put 2=0, nehich gives
1
4x²-9y² = 36
4x²-gy².
36 36
2²-42=1 ANSWER
x²y²
= 1
g
This represents a hyperbola | ANSWER.
TRACE OU X2 PLANE:
уго,
4x² = 9(2²+4)
4x²-92²=36
Put
a
nehich
ANSWER.
This represents a hyperbola ANSWER
• The surface,
gines,
= 1
•TRACE ON
.
42
PLANE:
Put x=0, nehich quies,
-9y² = 9 (2²+4)
= 2 +4
2²+y² = - + | ANSWER.
-4
This represents emagénary wiele, which
is obneously [emply] ANSWER
TRACE
ON
planes z = +312
Put y = ±312, nehich gives
4 (+ 3√2)-ay² = 9(2²+4)
+(18) -9y² = 9(²²+4)
72-9y² = 9(2²14)
36 = 922+ay2
4 = y² + 2² ANSWER:
this
represents a circle of raders 2 Centere
at Orugen
4x²= gy² = 9 (2²+4) represents / HYPERBOLOID OF
TWO SHEETS ANSWER.
Transcribed Image Text:geven, 2 47²-9y² = 9(2²+4) • TRACE ON TY PLANE: Put 2=0, nehich gives 1 4x²-9y² = 36 4x²-gy². 36 36 2²-42=1 ANSWER x²y² = 1 g This represents a hyperbola | ANSWER. TRACE OU X2 PLANE: уго, 4x² = 9(2²+4) 4x²-92²=36 Put a nehich ANSWER. This represents a hyperbola ANSWER • The surface, gines, = 1 •TRACE ON . 42 PLANE: Put x=0, nehich quies, -9y² = 9 (2²+4) = 2 +4 2²+y² = - + | ANSWER. -4 This represents emagénary wiele, which is obneously [emply] ANSWER TRACE ON planes z = +312 Put y = ±312, nehich gives 4 (+ 3√2)-ay² = 9(2²+4) +(18) -9y² = 9(²²+4) 72-9y² = 9(2²14) 36 = 922+ay2 4 = y² + 2² ANSWER: this represents a circle of raders 2 Centere at Orugen 4x²= gy² = 9 (2²+4) represents / HYPERBOLOID OF TWO SHEETS ANSWER.
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