bruh we need to get these moderators off this app they are WAY to priveleged AND they ABUSE it its so annoying the other day i asked a question for MATH yes MATH and they took it down and who are "they" oh for example *cough* *cough* gabriella8671 and *cough* *cough* cherbear this cr ap is hella annoyingpls stop...

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

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) = .