Find the derivative of y with respect to the appropriate variable.y = (9 - 9?) tanh-1 ?
A. 
- 9 tanh-1 ?
B. 
- 9 tanh-1 ?
C. 
- 9 tanh-1 ?
D. 
Answer: B
Mathematics
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Find the quadratic approximation of f at x = 0.f(x) = sin ln(2x + 1)
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