# Math Help - find the value of k.....

1. ## find the value of k.....

I need some help with this exercise
find a value of the constant k such that the limit exist

lim (x^2 -kx+4)/x-1
x →1
thanks in advance!!

2. Originally Posted by vance
I need some help with this exercise
find a value of the constant k such that the limit exist

lim (x^2 -kx+4)/x-1
x →1
thanks in advance!!
x=1 has to be a zero of the numerator so that (x-1) cancels out when finding the limit.

Good luck!