Hello,

The question is : For what value of b is the line y=10x tangent to the curve y=e^(bx) at some point in the x-y plane?

a) 10/e

b) 10

c) 10e

d) e^10

e) e

The correct answer is a.

I know that the derivative of the curve should be equal to the line however i couldn't make it. I would be very grateful to your help.

Thank you.