3. Let f: R→ R be a function for which a tangent line to its graph is well-defined at every point along the graph. A. If a is a real number and h is a nonzero real number, the expression (a + h, f(a+h)). Through some combination of pictures and/or words, explain why this is so. B. If h approaches zero in value, then then expression f(a+h)-f(a) approaches the slope of the tangent line to function f at the point x = a. Through f(a+h)-f(a) h provides the slope of a secant line through the points (a, f(a)) and some combination of pictures and/or words, explain why this is so. C. Assume function f is defined by f(x) = x² + 5x - 1 and real number a is equal to -1, use the technique inferred by Part A and B to deduce the slope of the tangent line to function fat x = -1. D. Find a point-slope equation for the tangent line to function f at x = -1. (Note: your result from part C gives you some of the information you need here.)

Calculus: Early Transcendentals
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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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Please only help with Question D, thank you!

3. Let \( f: \mathbb{R} \to \mathbb{R} \) be a function for which a tangent line to its graph is well-defined at every point along the graph.

A. If \( a \) is a real number and \( h \) is a nonzero real number, the expression \( \frac{f(a+h) - f(a)}{h} \) provides the slope of a secant line through the points \( (a, f(a)) \) and \( (a+h, f(a+h)) \). Through some combination of pictures and/or words, explain why this is so.

B. If \( h \) approaches zero in value, then the expression \( \frac{f(a+h) - f(a)}{h} \) approaches the slope of the tangent line to function \( f \) at the point \( x = a \). Through some combination of pictures and/or words, explain why this is so.

C. Assume function \( f \) is defined by \( f(x) = x^2 + 5x - 1 \) and real number \( a \) is equal to \(-1\), use the technique inferred by Part A and B to deduce the slope of the tangent line to function \( f \) at \( x = -1 \).

D. Find a point-slope equation for the tangent line to function \( f \) at \( x = -1 \). (Note: your result from part C gives you some of the information you need here.)
Transcribed Image Text:3. Let \( f: \mathbb{R} \to \mathbb{R} \) be a function for which a tangent line to its graph is well-defined at every point along the graph. A. If \( a \) is a real number and \( h \) is a nonzero real number, the expression \( \frac{f(a+h) - f(a)}{h} \) provides the slope of a secant line through the points \( (a, f(a)) \) and \( (a+h, f(a+h)) \). Through some combination of pictures and/or words, explain why this is so. B. If \( h \) approaches zero in value, then the expression \( \frac{f(a+h) - f(a)}{h} \) approaches the slope of the tangent line to function \( f \) at the point \( x = a \). Through some combination of pictures and/or words, explain why this is so. C. Assume function \( f \) is defined by \( f(x) = x^2 + 5x - 1 \) and real number \( a \) is equal to \(-1\), use the technique inferred by Part A and B to deduce the slope of the tangent line to function \( f \) at \( x = -1 \). D. Find a point-slope equation for the tangent line to function \( f \) at \( x = -1 \). (Note: your result from part C gives you some of the information you need here.)
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