A) \[\frac{-2{{b}^{3}}}{{{({{a}^{2}}+{{b}^{2}})}^{2}}}\]
B) \[\frac{6{{a}^{2}}b}{{{({{a}^{2}}+{{b}^{2}})}^{2}}}\]
C) 0
D) \[\frac{5{{a}^{2}}b}{{{a}^{2}}+{{b}^{2}}}\]
E) None of these
Correct Answer: C
Solution :
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