Exam Maths Puzzle Algebra

For the following piecewise defined function find f(1)
(x) = {x^2+1,....x<0
{x-1,......X>0

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Exam Other Question

Find the equation of the line that contains the point (2,-3) and has slope 2/3. State the domain of r(x) and range of r(x) in the equation r(x)=(6x+12)/(x^2-16)