Which of the following is the solution to the equation 3/4 y = 24?
y = 18
y = 32
y = 64
y = 72

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) = .

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

(x-5)1/2+5=2 what is a possible solution?