(x^22x1,x^2-1
举一反三
- 积分[img=136x52]1803d6afd4e6f95.png[/img]的计算程序和结果是 A: clearsyms xy=1/x^2/sqrt(x^2-1)int(y,x,-2,-1)3^(1/2)/2 B: clearsyms xint(1/x^2/sqrt(x^2-1),x,-2,-1)3^(1/2)/2 C: clearsyms xint(1/x/sqrt(x^2-1),x,-2,-1)-pi/3 D: clearsyms xint(1/x/sqrt(x^2-1),x,-2,-1)3^(1/2)/2 E: clearsyms xint(1/x^2*sqrt(x^2-1),x,-2,-1)log(3^(1/2) + 2) - 3^(1/2)/2
- 求极限lim(x→1)(2/x^2-1)-(1/x-1)
- 化简分式[img=229x50]1803072e13a5b44.png[/img]可以使用 A: Together[1/(x+1)-((x+3)/(x^2-1))(x^2-2x+1)/(x^2+4x+3)] B: Simplify[1⁄(x+1)-((x+3)⁄(x^2-1))((x^2-2x+1)⁄(x^2+4x+3))] C: Reduce[1⁄(x+1)-((x+3)⁄(x^2-1))((x^2-2x+1)⁄(x^2+4x+3))] D: Apart[1⁄(x+1)-((x+3)⁄(x^2-1))((x^2-2x+1)⁄(x^2+4x+3))]
- 【单选题】(x^2-1,x 1)=（）
- 求下列函数的值域:(1)y=(x^2+2x+3)/x^2;(2)y=(x^2-3x+4)/x;(3)y=3x/(2x^2-1),x∈[2,4]