13. Find the tangent of the curve x3-x2y2+y3=5 at point  (1, 2). 
(A)5x + 24y − 53 =0
(B)5x − 24y + 43 =0
(C)5x − 8y +11 =0
(D)5x + 8y − 21 =0
(E)5x-12y+19=0

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統計： A(0), B(0), C(1), D(0), E(0) #2348348