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Allushta [10]
3 years ago
8

Determine the inverse of f(x) = x^3 - x^2 - 2x show steps

Mathematics
1 answer:
ki77a [65]3 years ago
8 0

Switch the x and y values to find the inverse.

<span>y=<span>x−3x+2</span></span>

The inverse is given by

<span>x=<span>y−3y+2</span></span>

Solve for y now:

<span>x(y+2)=y−3</span>

xy+2x=y−3

2x+3=y−xy

<span>2x+3=y(1−x)</span>

<span><span>2x+31−x</span>=y</span>

The inverse, <span><span>f−1</span>(x)</span>, is given by <span><span><span>f−1</span>(x)</span>=<span>2x+31−x</span></span>.

The function can be graphed using knowledge of asymptotes, invariant points, and intercepts. Prepare a table of values for <span>f(x)</span>. Recall that <span><span>f−1</span>(x)</span> is simply a transformation of(x) over the line y=x, so <span><span>f−1</span>(x)</span> has a table of values where X and y are inverted relative to <span>f(x)</span>.

For example, if the point (2,3) belongs on the graph of <span>f(x)</span>, the point (3,2) belongs on <span><span>f−1</span>(x)</span>.


Replace <span><span>F<span>(X)</span></span><span>FX</span></span> with <span>yy</span>.<span><span>y=<span><span><span>X3</span>+<span>2X</span></span><span><span>−3</span>X</span></span></span><span>y=<span><span><span>X3</span>+<span>2X</span></span><span><span>-3</span>X</span></span></span></span>Interchange the variables.<span><span>X=<span><span><span>y3</span>+<span>2y</span></span><span><span>−3</span>y</span></span></span><span>X=<span><span><span>y3</span>+<span>2y</span></span><span><span>-3</span>y</span></span></span></span>
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