Question

Qual o valor de x na igualdade ((x 1) / (2 0)) ((-2 3) / ( 0 1)) = ((-10 16) / (-4 6)):

a) 10
b) 5
c) 6
d) 8

Answer 1

P.G. infinita 
___________________________ 

a1 = x 
q = 1/3 
S = 12 


S= (a1) / [1-q] 

12 = x / [ 1 - (1/3) ] 

12 = x / (2/3) 

x = (12*2) /3 

x = 8