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20. Let f(x)= x + x – 2. Completely simplify the following: 2f (a + 1) – 3 = 2+ XXL )-3 21.

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The function f is graphed on the right. -6 F2 4 6 8 a) What is the domain of f? What is the range of f? c) Evaluate f(-2) d) Find the value(s) of æ such that f(1) = – 2. Get Math Help Today