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Give the domain and range of y=-lx-2l

Please the domain and range of this function

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Kirill Z. | Physics, math tutor with great knowledge and teaching skillsPhysics, math tutor with great knowledge...
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Since | | operation is defined for all real numbers, domain D consists of all real numbers x, x∈R.
 
Since | | operation yields number greater of equal to zero, the range of -|x-2| is (-∞;0]. (Pay attention to the minus sign in front of |x-2| ).