Find the derivative of y.y = 2t3 tanh 

A. 6t2 tanh  - 4 sech2 
B. 6t2 tanh  - 2 sech2 
C. 6t2 tanh  - 4 sech 
D. 6t2 tanh  + 4 sech2 

Answer: A

Mathematics

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