Which of the following is the expression for \(\frac{∂p_i}{∂a_k}\ – McqOptions

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1.	Which of the following is the expression for \(\frac{∂p_i}{∂a_k}\)?
A.	\(\frac{-p_i^{N+k}}{\prod_{l=1}^n p_i-p_l}\)
B.	\(\frac{p_i^{N-k}}{\prod_{l=1}^n p_i-p_l}\)
C.	\(\frac{-p_i^{N-k}}{\prod_{l=1}^n p_i-p_l}\)
D.	None of the mentioned
Answer» D. None of the mentioned

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