Answers

2014-07-04T16:13:36+08:00
Derivative is the slope of the tangent line to the graph of the equation at a certain point. (Just Google it for the real definition)

Y=3x²-2x+4 @ x=-1

dY/dx = 6x - 2

dY/dx @ x = -1:
6(-1) - 2 = -6 - 2 = -8
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