Is this a function or not a function? (Picture)

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

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

If a is a nonzero real number then the reciprocal of a is