Solution 1.1:1b

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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]]
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{| align="center"
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||{{:1.1 - Figure - Solution - The graph of f(x) in exercise 1.1:1 with horizontal tangents}}
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||<small>The graph of ''f''(''x'') has horizontal tangents<br> at ''x''&nbsp;=&nbsp;-3 and ''x''&nbsp;=&nbsp;2</small>
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In the figure, we see that this happens when
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In the figure, we see that this happens when <math>x=-3</math> and <math>x=2\,</math>.
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<math>x=-\text{3 }</math>
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and
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<math>x=\text{2}</math>.
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Current revision

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

[Image]

The graph of f(x) has horizontal tangents
at x = -3 and x = 2

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

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