(a) Show tm/n = ( n√t)m for all m, n ∈ N.(b) Show log(tx) = x log t, for all t > 0 and x ∈ R.(c) Show tx is differentiable on R and find the derivative.Finding the right definition for x! is harder than defining tx, but the strategyis essentially the same. We are seeking a formula of the form n! = g(n) where g yields a meaningful formula when n is replaced by x. What might such a function g(x) = x! look like when graphed over R? For x ≥ 0 it must grow extremely rapidly to keep up with n!, but how about on x < 0? Using a functional equation for x! we can create a reasonable artist’s rendering of the function we are looking for.

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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(a) Show tm/n = ( n√t)m for all m, n ∈ N.
(b) Show log(tx) = x log t, for all t > 0 and x ∈ R.
(c) Show tx is differentiable on R and find the derivative.
Finding the right definition for x! is harder than defining tx, but the strategy
is essentially the same. We are seeking a formula of the form n! = g(n) where g yields a meaningful formula when n is replaced by x. What might such a function g(x) = x! look like when graphed over R? For x ≥ 0 it must grow extremely rapidly to keep up with n!, but how about on x < 0? Using a functional equation for x! we can create a reasonable artist’s rendering of the function we are looking for.

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