lim_(x->b)(x^(5/2)-b^(5/2))/(x^(3/5)-b^(3/5)) =-?
A. 25/6 x 19/10
B. 3/2b19/10
C. 3/2b19/10
D. 25/6b19/10
সঠিক উত্তরঃ
D.
25/6b19/10
Explanation: 
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