Greetings,

This should be a relatively easy question, but, unfortunately, I am struggling with solving it. I understand the forum is used purely for guiding someone. However, I have the GRE Math Subject test in 13hrs and need to see how this problem is worked out if someone wouldn't mind.

The question is:

For what value of b is the line tangent to the curve at some point in the xy-plane?

Thanks again.