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Let f, g : R rarr R be defined respectiv...

Let f, `g : R rarr R` be defined respectively by f(x) = 2x + 3 and g(x) = x - 10. Find f-g.

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`(f-g)(x) = f(x) - g(x)`
`= 2x + 3 - x + 10 = x + 13`
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