Thread: I need help to find the value of " m " (variable)

In this function y = {sin2x/x (for x no 0), and m-1 (for x=0) } find the value of m that function y to be countinous in x=0.
Can anybody help me with this?

I'm not sure how advanced your definition of continuity is. In the most elementary terms, a function is continuous at a point b if 1) the limit of the function at b exists and 2) it equals .

You can see that has a removable discontinuity at . So, the limit exists at 0, but the actual value of the function is undefined (because that pesky x in the denominator becomes zero, and dividing by zero is undefined). So, if we simply define , we have defined the function so that the limit at 0 exists, and the function takes on the value of the limits. So, m=3.

Originally Posted by reobjan

In this function y = {sin2x/x (for x no 0), and m-1 (for x=0) } find the value of m that function y to be countinous in x=0.

Hint: so

Just a little more:
so [/QUOTE]