What magnitude is not possible when a vector of magnitude 3 is added to a vector of magnitude 4?

Answer 1

I'm guessing it depends on the direction of the magnitude.

if both are positive
|3+4|=7
if one is negative
|-3+4|=1
if the other is negative
|3-4|=1

So considering all the possibilities, it can't be anything besides 7 and 1