Prove that the function ax+b cx+d f(x)=- is constant (takes the same value for every x such that cx+d ‡0) if and only if a b |- c d (Hint: Find the derivative of f(x). The quotient rule for derivatives is: = 0.
Prove that the function ax+b cx+d f(x)=- is constant (takes the same value for every x such that cx+d ‡0) if and only if a b |- c d (Hint: Find the derivative of f(x). The quotient rule for derivatives is: = 0.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:Prove that the function
ax+b
cx+d
ƒ(x)=·
is constant (takes the same value for every x such that cx+d #0) if and only if
la bl
|
(Hint: Find the derivative of f(x). The quotient rule for derivatives is:
U
= 0.
u'v-uv'
1²
.)
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