09-11-2015
Mathematics

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Let f(x) = 2x-7 and g(x) =-6x-3. Find f(x)+g(x) and state its domain

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09-11-2015

[tex]f(x)=2x-7\to D_f:x\in\mathbb{R}\\\\g(x)=-6x-3\to D_g:x\in\mathbb{R}\\\\f(x)+g(x)=(2x-7)+(-6x-3)=2x-7-6x-3\\\\=(2x-6x)+(-7-3)=-4x-10\to D_{f+g}:x\in\mathbb{R}[/tex]

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