Question

se x = (2/3)-² e y = 1/5 determine o valor de

a) xy
b) x/y
c)x + y -¹

Answer 1

x = (2/3)-² = (3/2)² = 9/4
 y = 1/5

a) xy = 9/4 . 1/5 = 9/20

b) x/y = 9/4 : 1/5 = 9/4 . 5/1 = 45/4

c)x + y -¹ = 9/4 + (1/5)-¹ = 9/4 + 5 = 29/4