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The area of the rectangle m.
But area of a rectangle is .
Where is the length of the rectangle.
is the breadth of the rectangle.
Find in terms of .
.
Perimeter of a rectangle is .
Find the expression for perimeter of the rectangle in terms of .
Substitute in the above expression.
Domain :
The denominator of the function should not be a zero.
So .
But perimeter can not be a negative.
All positive real numbers of is the domain of the function .
The domain of the is .
.
The domain of the is .
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