2.
Evaluate for f(4)
-3
-1.
7
4.
a) -3
b)
C) 4
I d) 7
3.
Evaluate for f(2)
-3
-1
4
O a) -3
c) 4
b) o
(13 d) 7

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

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) = .

Sh what is the value of x? ox= 2.25 x = 11.25 ox= x = 22 1 (2x + 10) seo - (6x + 1) -- nie