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If the derivative of a function is its slope, then for a constant function, the derivative must be zero. example: The derivative of a constant is zero. 3.3 Basic Differentiation Formulas
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If the derivative of a function is its slope, then for a constant function, the derivative must be zero. example: The derivative of a constant is zero.
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We saw that if,. This is part of a pattern. examples: power rule Power Rule
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Don’t forget it! Special Case? – or just obvious Power Rule
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examples: Constant multiple rule:
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(Each term is treated separately) Sum and Difference rules:
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Example : Find the horizontal tangents of: Horizontal tangents occur when slope = zero. Plugging the x values into the original equation, we get: (The function is even, so we only get two horizontal tangents.)
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First derivative (slope) is zero at:
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Find the tangent line of the curve y = x + at x = 1. F(1) = 3 so p(1,3), F’(x) = 1 - then M = F’(1) = -1 so the tangent line is y = 3 – (x -1) So Y = -x + 4.
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3.4 The Product and Quotient Rules
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Product Rule The first times the derivative of the second plus the second times the derivative of the first
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Product rule: Notice that this is not just the product of two derivatives. This is sometimes memorized as:
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Product rule
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Product rule Example 2
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Now Simplify and reduce. Quotient Rule
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……. The bottom times the derivative of the top minus the tope times the derivative of the bottom all over the bottom squared. Quotient Rule
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Quotient Rule
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Find if Exercise
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