I have a clueless friend who believes that
$$ \sum_{n=1}^\infty \frac{1}{2^n} $$
doesn't equal $1$ in the 'normal arithmetical sense'. He doesn't believe that this series flat out equals $$1$$ Is he correct?
I have a clueless friend who believes that
$$ \sum_{n=1}^\infty \frac{1}{2^n} $$
doesn't equal $1$ in the 'normal arithmetical sense'. He doesn't believe that this series flat out equals $$1$$ Is he correct?