Perform the indicated operations.
?

?
A.
B.
C.
D.
E.
Answer: B
Mathematics
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Solve the problem.The letter Z has a symmetry type
A. D2. B. Z1. C. Z2. D. D1. E. none of these
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Find the derivative of y.y = sech (-2?) (1 - ln sech(-2?))
A. sech (-2?) tanh (-2?) ln sech (-2?) B. 1 + 2 sech (-2?) tanh (-2?) ln sech (-2?) C. -2 sech (-2?) tanh (-2?) ln (-2?) D. -2 sech (-2?) tanh (-2?) ln sech (-2?)
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