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18-04-2017
Mathematics

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The inverse of the function y = 9 - x 2, for all values x ≥ 3, is _, where x can take values _.

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18-04-2017

y = 9 - x^2
Steps to finding the inverse:
1. switch x & y
x = 9 - y^2
2. solve for y
x = 9 - y^2
subtract 9 from both sides
x - 9 = y^2
take the square root of both sides
+ - sqrt(x - 9) = y
x > = 9

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