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The point P (5,3) lies on the curve y =3/(4 x ). (a) If Q is the point ( x ,3/(4 x )), use your
The point
P(5,3)
lies on the curve
y=3/(4x).
(a) IfQis the point
(x,3/(4x)),
use your calculator to find the slope
mPQ
of the secant linePQ(correct to six decimal places) for the following values ofx.(i) 4.9
mPQ=
(ii) 4.99
mPQ=
(iii) 4.999
mPQ=
(iv) 4.9999
mPQ=
(v) 5.1
mPQ=
(vi) 5.01
mPQ=
(vii) 5.001
mPQ=
(viii) 5.0001
mPQ=
(b) Using the results of part (a), guess the value of the slopemof the tangent line to the curve at
P(5,3).
m=
(c) Using the slope from part (b), find an equation of the tangent line to the curve at
P(5,3).
y=3x18
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