Progression (Sequence and Series)Hard
Question
The standard deviation of a variate x is σ. The standard deviation of the variable
; a, b, c are constants, is-
Options
A.
σ
B.
σ
C.
σ
D.None of these
More Progression (Sequence and Series) Questions
The positive integer n , for which the solutions of the equation$${x(x + 2) + (x + 2)(x + 4) + \ldots. + (x + 2n - 2)(x ...If the numbers a,b,c,d,e form an A.P., then the value of a − 4b + 6c − 4d + e is-...The G.M. of roots of the equation x2 − 2ax + b2 = 0 is equal to which type of mean of roots of x2 − 2bx + a2...If A.M. between p and q (p ≥ q) is two times the GM, then p: q is-...The sum of roots of the equation ax2 + bx + c = 0 is equal to the sum of squares of their reciprocals. Then bc2, ca2 and...