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makvit [3.9K]
3 years ago
12

Need help with 2 and 4 ASAP Inverses...

Mathematics
1 answer:
Drupady [299]3 years ago
4 0

2.

h(x) = 1/(x - 1)

<em><u>Replace h(x) with y.</u></em>

y = 1/(x - 1)

<u><em>Swap x and y.</em></u>

x = 1/(y - 1)

<em><u>Solve for y.</u></em>

<em><u>Multiply both sides by (y - 1)</u></em>

x(y - 1) = 1

<em><u>Distributive property.</u></em>

xy - x = 1

<em><u>Add x to both sides.</u></em>

xy = 1 + x

<em><u>Divide both sides by x.</u></em>

y = 1/x + 1

<em><u>Replace y with h^-1(x)</u></em>

H^-1(x) = 1/x + 1 is the inverse function for question 2.


4.

h(x) = 4/(x + 2)

<em><u>Replace h(x) with y.</u></em>

y = 4/(x + 2)

<em><u>Swap y and x.</u></em>

x = 4/(y + 2)

<em><u>Solve for y.</u></em>

<em><u>Multiply both sides by y + 2.</u></em>

x(y + 2) = 4

<em><u>Distributive property.</u></em>

xy + 2x = 4

<em><u>Subtract both sides by 2x.</u></em>

xy = 4 - 2x

<em><u>Divide both sides by x.</u></em>

y = 4/x - 2

<em><u>Replace y with h^-1(x)</u></em>

H^-1(x) = 4/x - 2 is the inverse function for question 4.

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