[tex]\lim_{x \to 49}[/tex]
not sure where to go from here. I tried factoring out (x-49), but I still end up with an undefined answer.
What am I missing? (the answer is not undefined!)
Thanks!
Your numerator is incomplete...
If x is 49, the numerator is 49(7)+49(7)-49(7)-7(49)
which means we've gotten nowhere!
Both numerator and denominator are still zero if x=49.
This is because we are still subtracting equal quantities in both numerator and denominator.
Notice how Harish's method leaves us without subtractions.