So.. Math is frustrating =(
Here is my question:
Determine the slope of the tangent to y= 1/1-x at the point (2, -1) without constructing a table. Explain what you are doing.
The related example in the book that they give me for this question was a bit confusing because their point was (4,4).
With the same question (different function) and the point (4,4) they said:
To find the equation of the tangent, approximate the slope by setting a value for x close to be, so use 4.001. The slope can be found by using
m= ( f(4.001) - f(4))/ (4.001 - 4)
Would have been nice if they had used two different digits for the points! I tried this, and I did not get the right answer.. A forum member helped me with this question before, and they said that my slope was 1, but I end up with a slope of 1999.9
Very Frustrating! =( any help? I would like to answer the question the way that they do in the book.