don't you need to find the second derivative to find the nature of a turning point?
you presume the first derivative = 0 otherwise it wouldn't be stationary...
yeah, but the first derivative doesn't give zero, it gives infinity, and it should give zero, otherwise it's not a stationary point?
yeah, but the first derivative doesn't give zero, it gives infinity, and it should give zero, otherwise it's not a stationary point?