If the S.D. of the items `x_1,x_2,…….x_nissigma`, what is the S.D. of the data `x_1+a,x_2+a,x_3+a,…….x_n+A`?

If barx is the mean of x1,x2,x3, ………..xn , then for a ne 0, the mean of ax_1,ax_2,…..,ax_n,(x_2)/a, (x_2)/a ,……., (x_n)/a is :

Let f(x)=x^2 + 3x-3,x leq 0 . If n points x_1, x_2, x_3,.....,x_n are so chosen on the x-axis such that (1) 1/n sumf^-1(x_i)=f(1/n sum_( i=1 )^nx_i) (2) sum_(i=1) ^ n f^-1(x_i)=sum_(i=1) ^ n x_i where f^-1 denotes the inverse of f, Then the AM of xi's is a)1 b)2 c)3 d)4

Find a quadratic equation whose product of roots x_1 a n d x_2 is equal to 4 and satisfying the relation (x_1)/(x_1-1)+(x_2)/(x_2-1)=2.

If x_(1),x_(2),x_(3),.,x_(n) are the roots of the equation x^(n)+ax+b=0 , the value of (x_(1)-x_(2))(x_(1)-x_(3))(x_(1)-x_(4))…….(x_(1)-x_(n)) is

The number of particles given by n = D (n_2 - n_1)/(x_2 - x_1) are crossing a unit area perpendicular to x-axis in unit-time. n_1 and n_2 are the number of particles per unit volume for the values of x meant to be x_1 and x_2 .What is the dimensional formula of diffusion constant D?

The equation to the chord joining two points (x_1,y_1)a n d(x_2,y_2) on the rectangular hyperbola x y=c^2 is: x/(x_1+x_2)+y/(y_1+y_2)=1 x/(x_1-x_2)+y/(y_1-y_2)=1 x/(y_1+y_2)+y/(x_1+x_2)=1 (d) x/(y_1-y_2)+y/(x_1-x_2)=1

If x_1,x_2 & x_3 are the three real solutions of the equation x^(log_10^2 x+log_10 x^3+3)=2/((1/(sqrt(x+1)-1))-(1/(sqrt(x+1)+1))), where x_1 > x_2 > x_3, then these are in

Let x_(1),x_(2),x_(3),x_(4) be the roots (real or complex) of the equation x^(4)+ax^(3)+bx^(2)+cx+d=0. If x_(1)+x_(2)=x_(3)+x_(4) and a,b,c, d in R, then find the value of b-c

The total number of terms which are dependent on the value of x in the expansion of (x^2-2+1/(x^2))^n is equal to 2n+1 b. 2n c. n d. n+1

Find the critical points(s) and stationary points (s) of the function f(x)=(x-2)^(2//3)(2x+1)