y=（mx^2+4倍根号3+n）/(x^2+1)变形得 x^2=(4√3+n-y)/(y-m)因x^2≥0 则(4√3+n-y)(y-m)≥0即[y-(4√3+n](y-m)≤0分两种情况(1) m≤y≤4√3+n,此时ymin=m=-1 ymax=4√3+n=7函数式为y=(-x^2+7)/(x^2+1)(2) 4√3+n≤y...