december 6, 2012
DESCRIPTION
December 6, 2012. AIM : How do we find the derivative of quotients?. Do Now : Find the derivatives. HW2.3b Pg. 126 - 128 #7 – 11 odd, 15, 65, 81, 95, 105 – 108. How can we find the derivative of. The Quotient Rule. How can we find the derivative of Or, we can use the Quotient Rule: - PowerPoint PPT PresentationTRANSCRIPT
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December 6, 2012AIM: How do we find the derivative
of quotients?
Do Now: Find the derivatives
HW2.3b Pg. 126 - 128 #7 – 11 odd, 15, 65, 81, 95, 105 – 108
xexf x cos)()1
x
xxg
sin)()2
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How can we find the derivative of
2
4)(
2
x
xxh
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The Quotient RuleHow can we find the derivative of
Or, we can use the Quotient Rule:If f and g are differentiable functions, then f/g
is a differentiable for all x such that g(x) ≠ 0, and
“The bottom times the derivative of the top minus the top times the derivative of the bottom over the bottom squared”
2
4)(
2
x
xxh
2
'
)(
)(')()(')()(
xg
xgxfxfxgx
g
f
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Example
Use the product rule to find the derivative of
Step 1: Define f(x) and g(x)Step 2: Find f’(x) and g’(x)Step 3: Plug into formula and simplify
2
4)(
2
x
xxh
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Practice
1. Find
2. Find
1
42 xx
x
dx
d
1)(,
21 x
xxh
dx
dhx
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1.
2.
3.
6.
4.
5.
Practice!