Dados a =[2,7], b=[-1,5], c=[3,9[, determine:

a) a – b

b) b – a

c) a – c

d) c – b

A) A -B= (2,7)
b) B-A= (-1,5)
c) A-C= (2,7)
d) C-B= (3,9)

X= (0,25)^0,25 = (25/100)^(25/100) = (1/4)^(1/4) = (4)^(-1/4) = (2²)^(-1/4) = (2)^(-2/4) = 2^(-1/2) 

y= (16)^(- 0,125) = (2^4)^(-125/1000) = (2^4)^(-1/8) = (2)^(-4/8) = 2^(-1/2) 

x = y = 2^(-1/2) 


x = y = 2^(-1/2) = (1/2)^(1/2)   = √(1/2) = √1/√2 = 1/√2 = (1 x √2)/(√2 x √2) = √2/2 

x = y = √2/2

3a+20b²+b²+13-15
3a+21b²+²-2