Question

resolver os sistemas no universo U=R²

a) 1/x + 1/y = 8 e 1/x - 1/y = -2

b) 1/x - 2/y = 1 e 2/x + 1/y = 9

c) 1/x + 1/y = 2 e 1/xy = 1

d) 1/x² - 9/y = 0 e 4/x + 3/y = 15

Answer 1

Answer:

the number of time a particular observation of your is called as frequency