This is question number 9 of James Stewart Mathematics for Precalculus 6th Edition
I already know the method where you substitute every single value from S into the equation but I was wondering if there was just a way to simplify it
This is question number 9 of James Stewart Mathematics for Precalculus 6th Edition
I already know the method where you substitute every single value from S into the equation but I was wondering if there was just a way to simplify it
$\displaystyle \frac{1}{x} \le \frac{1}{2}$
obvious that the inequality is true for all negative values of x
for positive values of x ...
$\displaystyle 2x \cdot \frac{1}{x} \le 2x \cdot \frac{1}{2}$
$\displaystyle 2 \le x$