int_(0)^(2)(dx)/(x^(2)+4)=

" (2) "int_(0)^(2)(2x)/(x^(2)-4)dx

int_(0)^(2)(dx)/(x+4-x^(2))

Evaluate the integrals int_(0)^(2)(dx)/(x+4-x^(2))

Evaluate the integrals by using substitution int_(0)^(2)(dx)/(x+4-x^(2))

If int_(0)^(oo)(dx)/((x^(2)+4)(x^(2)+9))=kpi then the value of k is

If int_(0)^(oo)(x^(2)dx)/((x^(2)+a^(2))(x^(2)+b^(2))(x^(2)+c^(2)))=(pi)/(2(a+b)(b+c)(c+a))" then "int_(0)^(oo)(dx)/((x^(2)+4)(x^(2)+9))=