- #1
imsmooth
- 152
- 13
While solving an equation, the lecturer was using substitution in this video:
x=au was subbed in for Psi at timestamp 39:27
d/dx = (1/a)(d/du). I get that.
But then the second derivative is stated as being
d2/dx2 = (1/a2)(d2/du2)
How is it (1/a2) if we do not know if there is an "a" in the function "u"?
x=au was subbed in for Psi at timestamp 39:27
d/dx = (1/a)(d/du). I get that.
But then the second derivative is stated as being
d2/dx2 = (1/a2)(d2/du2)
How is it (1/a2) if we do not know if there is an "a" in the function "u"?