What is the discontinuity and zero of the function f(x) = 3x^2 + x - 4 / x-1 question 3 options: 1) discontinuity at (1, 7), zero at ( negtive four thirds , 0) 2) discontinuity at (−1, 1), zero at ( negative four thirds , 0) 3) discontinuity at (1, 7), zero at ( four thirds , 0) 4) discontinuity at (−1, 1), zero at ( four thirds , 0)