If `1/(1^2)+1/(2^2)+1/(3^2)+..." to "oo = pi^2/6, " then " 1/1^2+1/3^2+1/5^2+..` equals

If 1/(1^2)+1/(2^2)+1/(3^2)+ tooo=(pi^2)/6,t h e n1/(1^2)+1/(3^2)+1/(5^2)+ equals pi^2//8 b. pi^2//12 c. pi^2//3 d. pi^2//2

If cos^-1((x^2 -1)/(x^2+1))+ tan^-1 ((2x)/(x^2-1)) = (2pi)/3 , then x equal to (A) sqrt(3) (B) 2+sqrt(3) (C) 2-sqrt(3) (D) -sqrt(3)

If x=(1)/(1^(2))+(1)/(3^(2))+(1)/(5^(2))+.... , y=(1)/(1^(2))+(3)/(2^(2))+(1)/(3^(2))+(3)/(4^(2))+.... and z=(1)/(1^(2))-(1)/(2^(2))+(1)/(3^(2))-(1)/(4^(2))+... then

Value of (1+1/3)(1+1/(3^2))(1+1/(3^4))(1+1/(3^8))........oo is equal to a. 3 b. 6/5 c. 3/2 d. none of these

The value of 1-1/2(2/3)+1/3(2/3)^(2)-1/4(2/3)^(3)+... is

If 1 + (1 + 2)/2 + (1 + 2 + 3)/3 + ...... to n terms is s , then s is equal to

The sum of the series 1 + (1)/(3^(2)) + (1 *4)/(1*2) (1)/(3^(4))+( 1 * 4 * 7)/(1 *2*3)(1)/(3^(6)) + ..., is

2[1/2 + 1/(3.2^(3)) + 1/(5.2^(5)) + …] is :

x = 1 + (1)/(3+(1)/(2+(1)/(3+1/(2...oo)))) then the value of x is

If z_(1)= 2sqrt(2)(1+i)" and "z_(2)=1+isqrt(3) , then z_(1)^(2)z_(2)^(3) is equal to