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# Which of the following is not a valid way of starting the process of factoring60x² +84x +49?Choose the inappropriate beginning below. O A. (x )(60)OB. (2x (30%)O C. (6x X10x)OD. (2x (5x )   ### Other questions on the subject: Mathematics Mathematics, 21.06.2019 14:00, 30valgolden
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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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Which of the following is not a valid way of starting the process of factoring60x² +84x +49?Choose t...

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