Mathematics, 15.12.2020 23:10 jlankford148
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What does negative 2 over 7 > −4 indicate about the positions of negative 2 over 7 and −4 on the number line?
negative 2 over 7 is located on the left of −4
negative 2 over 7 is located on the right of −4
negative 2 over 7 is located on the right of 0 and −4 is located on the left of 0
negative 2 over 7 is located on the left of 0 and −4 is located on the right of 0
Answers: 2
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Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
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What does negative 2 over 7 > −4 indicate about the positions of negative 2 over 7 and −4 o...
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