calculus
posted by David .
How do I take the partial derivative of P with respect to r of the following:
D ~ P = ‡”(t=1 to T)[t ~ (CF)_t/(1+r)^t ]

What character encoding do you use?
Using the standard Western 88591, we do not see anything mathematical. Unicode does not help either. 
What character encoding do you use?
Using the standard Western 88591, we do not see anything mathematical. Unicode does not help either.
Remember, if you copy and paste from Microsoft Word or other word processing software, the character encoding will not be understandable.