Find the range of the following function : f(x)=1+2 x+4 x - Vidyadip

Question

Find the range of the following function : $f(x)=1+2 x+4 x$

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Answer

$f(x)=1+2 x+4 x$
Since, $2 x>0,4 x>0$
$
\therefore \mathrm{f}(\mathrm{x})>1
$
$\therefore$ Range of $f=(1, \infty)$

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