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
I had been asked this question in class test.
My query is from Quantization of Filter Coefficients in chapter Digital Filters Design of Digital Signal Processing