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 ]

calculus 
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Using the standard Western 88591, we do not see anything mathematical. Unicode does not help either. 
calculus 
MathMate
What character encoding do you use?
Using the standard Western 88591, we do not see anything mathematical. Unicode does not help either.
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