def nuf(u):
IfPos(2.28-B,(1/(-0.003995*B**3+0.005956*B**2+0.00646*B + 0.001925)), ((1902.211*B-4266.42343)/0.016694669))
Here is my formule, but it doesn't work
The problem is whenever i put norm(
it returns NAN
even if the formula is well defined( 1/(B**2+1) for example )
Thank you and Sorry to not be claire