he point  P(8, −3)  lies on the curve  y = 3/(7 − x). (a) If Q is the point  (x, 3/(7 − x)),  use your calculator to find the slope  mPQ  of the secant line PQ (correct to six decimal places) for the following values of x. (i)    7.9 mPQ =  (ii)    7.99 mPQ =  (iii)    7.999 mPQ =  (iv)    7.9999 mPQ =  (v)    8.1 mPQ =  (vi)    8.01 mPQ =  (vii)    8.001 mPQ =  (viii)    8.0001 mPQ =  (b) Using the results of part (a), guess the value of the slope m of the tangent line to the curve at  P(8, −3). m =   (c) Using the slope from part (b), find an equation of the tangent line to the curve at  P(8, −3).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
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Question

he point 

P(8, −3)

 lies on the curve 

y = 3/(7 − x).
(a) If Q is the point 
(x, 3/(7 − x)),
 use your calculator to find the slope 
mPQ
 of the secant line PQ (correct to six decimal places) for the following values of x.
(i)    7.9
mPQ = 


(ii)    7.99
mPQ = 


(iii)    7.999
mPQ = 


(iv)    7.9999
mPQ = 


(v)    8.1
mPQ = 


(vi)    8.01
mPQ = 


(vii)    8.001
mPQ = 


(viii)    8.0001
mPQ = 

(b) Using the results of part (a), guess the value of the slope m of the tangent line to the curve at 
P(8, −3).

m =  


(c) Using the slope from part (b), find an equation of the tangent line to the curve at 
P(8, −3).

 
 
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