12. Find the indicated limit, if it exists. (1 point) 1-X
lim f(x), f(x) =
X-1
x < 1
8 x= 1
x + 7 x > 1
08
O The limit does not exist.
0
O
7

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm