Question

please answer this question....... need step by step explanation^_^​

Answer 1

Answer:

4) [2, inf)

Step-by-step explanation:

x-1 should be greater than 0

so, x-1>0

 x>1

base of log should greater than 0 and not equal to 1

so,

[x]>0    [x]not= 1

x=[1, inf)    x not in [1,2)

so,

x=[2,inf)

intersection of two set give [2, inf)