Solution 1.1:1b

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{{NAVCONTENT_START}}
 
At those points where the graph of the function has a horizontal tangent (gradient equal to zero), the derivative is zero.
At those points where the graph of the function has a horizontal tangent (gradient equal to zero), the derivative is zero.
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[[Image:1_1_1_b.gif|center]]
[[Image:1_1_1_b.gif|center]]
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In the figure, we see that this happens when x=-3 and x=2.
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In the figure, we see that this happens when
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<math>x=-\text{3 }</math>
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{{NAVCONTENT_STOP}}
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and
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<math>x=\text{2}</math>.

Revision as of 11:13, 10 October 2008

At those points where the graph of the function has a horizontal tangent (gradient equal to zero), the derivative is zero.

In the figure, we see that this happens when \displaystyle x=-\text{3 } and \displaystyle x=\text{2}.