I have to study limit now and Function ....
that is because of our teacher!!! what can I do for my country if I can't keep it on and hurry up,
I'm very slow
]]>but for the end of sol I don't know what is the truth 100% the sol of teacher or min
anyway I need you solution cause it is always true when you are using the graph
to make sure I'm point to my teacher with a correct information
]]>Are you sure you copied the problem down correctly for #2?
]]>and maybe (-∞,9], but I can't chose that one cause it is consist number 3 which make the denominator zero and I'll point this to the teacher,...
please can you give me the end of sol that you get it????
]]>when (x-9) (x-1) ≥ 0
(x-9) = 0 , x=9 the interval is [9,∞) , test a value between this interval : "10" : 10^2 - 10*10 +9 ≥ 0 , +9 ≥ 0 and that is true!
(x-1) ≥ 0 x=1 the interval is [1,∞) , test a value between this interval : "2" : 2^2 - 10*2 +9 ≥ 0 , -7 ≥ 0 , and that is WRONG! so Switch this inequality and become : x ≤ 1 , the interval is : (-∞,1]
sol : (-∞,1] U [9,∞), except -3
is that ok? hehehe
]]>2) Plot them on the number line.
3) Pick a point or points to get the interval you want.
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