Which value of w makes the equation below true?
11 + (9w - 12) = -5(5+w)
w=-4
w=9
...
Mathematics, 05.10.2020 01:01 keshonerice
Which value of w makes the equation below true?
11 + (9w - 12) = -5(5+w)
w=-4
w=9
w=-2.25
w=all real numbers
Answers: 2
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Prove (a) cosh2(x) ā sinh2(x) = 1 and (b) 1 ā tanh 2(x) = sech 2(x). solution (a) cosh2(x) ā sinh2(x) = ex + eāx 2 2 ā 2 = e2x + 2 + eā2x 4 ā = 4 = . (b) we start with the identity proved in part (a): cosh2(x) ā sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 ā sinh2(x) cosh2(x) = 1 or 1 ā tanh 2(x) = .
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