Guess the value of the limit (if it exists) by evaluating the function at the given numbers (correct to four decimal places): x = -5.9, -5.99 , -5.999 , -5.9999, -6.1, -6.01, -6.001, -6.0001 If the limit does not exist enter DNE . lim 7 . x + 42 x- -6 x2- x -42