Mathematics, 20.09.2019 11:30, nunyuh69

Define a function f : r → r by the formula
f(x) = 2x − 8.
prove that f is one-to-one.
let a, b is in r, and suppose that
f(a) = f(b).
then
2a − 8 =

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Define a function f : r → r by the formula
f(x) = 2x − 8.
prove that f is one-to-one.