Does the graph of Sx² sin (1/x), x # 0 lo, f(x) = x = 0 have a tangent at the origin? Give reasons for your answer.

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
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Chapter1: Functions
Section1.2: Functions Given By Tables
Problem 32SBE: Does a Limiting Value Occur? A rocket ship is flying away from Earth at a constant velocity, and it...
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Testing for Tangents
35. Does the graph of
Sx² sin (1/x), x # 0
lo,
f(x) =
x = 0
have a tangent at the origin? Give reasons for your answer.
36. Does the graph of
Sxsin (1/x), x+ 0
lo,
g(x) =
x = 0
have a tangent at the origin? Give reasons for your answer.
Vertical Tangents
We say that a continuous curve y = f(x) has a vertical tangent at the
point where x = xo if the limit of the difference quotient is o or -0o.
For example, y = x/3 has a vertical tangent at x = 0 (see accompa-
nying figure):
f(0 + h) -
lim
f(0)
h/3
= lim
1
= lim
h0h2/3
= 00.
y
y = f(x) = x'/3
VERTICAL TANGENT AT ORIGIN
However, y = x2/3 has no vertical tangent at x = 0 (see next figure):
g(0 + h) - g(0)
lim
2/3
= lim
- 0
h
1
= lim
h0 h/3
Transcribed Image Text:Testing for Tangents 35. Does the graph of Sx² sin (1/x), x # 0 lo, f(x) = x = 0 have a tangent at the origin? Give reasons for your answer. 36. Does the graph of Sxsin (1/x), x+ 0 lo, g(x) = x = 0 have a tangent at the origin? Give reasons for your answer. Vertical Tangents We say that a continuous curve y = f(x) has a vertical tangent at the point where x = xo if the limit of the difference quotient is o or -0o. For example, y = x/3 has a vertical tangent at x = 0 (see accompa- nying figure): f(0 + h) - lim f(0) h/3 = lim 1 = lim h0h2/3 = 00. y y = f(x) = x'/3 VERTICAL TANGENT AT ORIGIN However, y = x2/3 has no vertical tangent at x = 0 (see next figure): g(0 + h) - g(0) lim 2/3 = lim - 0 h 1 = lim h0 h/3
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