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Unformatted text preview: x . 4 has been used to model the dependence of R on x , where R is measured in square millimeters and x ≥ is measured in appropriate units of brightness. The equation above is linear in x . 4 . Use this fact to solve for x . Look carefully at the steps involved in solving for x above. You have used equations that are not equivalent. Solve an inequality in order to determine the values of R for which there is a solution ( x,R ) . What seem to be the smallest and largest possible areas R for the pupil? Write the missing coordinates ( x,R ) of the following solutions to the equation: ( 0 , ) ( , 15 ) ( 1 , ) ( , 8 ) ( 243 , )...
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