Question

sendo x= 3/2, y= -1/4 e y=7, calcule. a) x+y+z. b) x-y-z. c) x.y.z

Answer 1

x = 3/2
y = -1/4 
z = 7

a)x + y + z
3/2 - 1/4 + 7 = 
m.m.c = 4
2*3/4 - 1*-1/4 + 7*4/4 = 
6/4 - 1/4 - 28/4 = 
 6/4 - 29/4 = - 23/4
b)x - y - z
3/2 + 1/4 - 7 =
m.m.c = 4
2*3/4 + 1 * 1/4 - 4*7/4= 
6/4 + 1/4 - 28/4 = 
7/4 - 28/4 = -21/4
c)x*y*z
3/2 * -1/4 * 7/1 = -21/8