Find a pattern for the sequence. Use the pattern to show the next two terms. 15, 13, 11, 9, ...
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15, 13, 11, 9, 0, 0

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

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) = .