MathematicsMedium110×since 2002Q3890The range of a∈\in∈R for which the function f(x) = (4a −-− 3)(x + log_e 5) + 2(a −-− 7) cot(x2)\left( {{x \over 2}} \right)(2x) sin²(x2)\left( {{x \over 2}} \right)(2x), x ≠\ne= 2nπ\piπ, n∈\in∈N has critical points, is :A[1, ∞\infty∞)B(−-−3, 1)C[−43,2]\left[ { - {4 \over 3},2} \right][−34,2]D(−-−∞\infty∞, −-−1]Check answerSkip