Afigure made of triangles, quadrilaterals, and other two dimentional figuresa is a

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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