How do you find the horizontal asymptote for $4/(1+e^(1-x))$ ?

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Answer 1 · 2016-02-04T14:55:28

$y=4$ and $y=0$ are horizontal asymptotes

Let $y=4/(1+e^(1-x))$

Try to imagine the value of $y$ if $x$ is made to increase up to $+oo$

As $x$ approaches the value $+oo$
$y$ approaches $4$

Try to imagine the value of $y$ if $x$ is made to decrease down to $-oo$

As $x$ approaches the value $-oo$
$y$ approaches $0$

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How do you find the horizontal asymptote for 4/(1+e^(1-x)) 4/(1+e^(1-x)) ?