F(x)=3x+1/4x+2 find the domain

asked Nov 24, 2019 121k views

4 votes

F(x)=3x+1/4x+2
find the domain

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1 vote

The denominator must be different by zero.

Therefore

$4x+2\\eq0\ \ \ |-2\\\\4x\\eq-2\ \ \ \ |:4\\\\x\\eq-0.5$

The domain of
f(x)=(3x+1)/(4x+2)

$D=\mathbb{R}-\{-0.5\}=(-\infty;\ -0.5)\ \cup\ (-0.5;\ \infty)$

Koolbanana answered Nov 27, 2019

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