" (i) "(1)/(50+2x^(2))

2-50x^(2)

int(1)/(50-2x^(2))dx

(2-50x ^(2))= ?

The sum of coefficients of integral powers of x in the binomial expansion of (1-2sqrt(x))^(50) is: (1) (1)/(2)(3^(50)+1)(2)(1)/(2)(3^(50))(3)(1)/(2)(3^(50)-1)(4)(1)/(2)(2^(50)+1)

If f(x)=log((1-x)/(1+x)) ,|x|<1" and f((2x)/(1+x^(2)))=K .f(x) then 50K=

If x=costheta,y=sin50," then "(1-x^(2))(d^(2)y)/(dx^(2))-x(dy)/(dx)=

If x_(i)>0i=1,2,3,...50x_(1)+x_(2)..+x_(50)=50 then the minimum value of (1)/(x_(1))+(1)/(x_(2))+...+(1)/(x_(50)) equals

"Let "f(x)=x + (1)/(2x + (1)/(2x + (1)/(2x + .....oo))). Then the value of f(50)cdot f'(50) is -