The curve is .
a)
Determine slope of the tangent line through the points and .
Slope of a secant line having points and : .
Substitute and in above formula.
.
Slope of the secant line is .
b)
The tangent line to the curve at the point is the line through point P with slope provided that the limit exists.
The curve is and point .
Slope of the tangent line is .
a) Slope of the secant line is .
b) Slope of the tangent line is .
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