[Tutor] Trajectory Syntax Error

[Carla Jenkins]

I am new to Python learnig for a class.  When I try using trajectory I receive an error.  Here is the code:

def logistic(x):
	return 4*x*(1-x)
ds_logistic11=trajectory(logistic,0.11)
SyntaxError: invalid syntax

Sincerely,
Carla Jenkins