Progression (Sequence and Series)Hard
Question
The mean of a set of observations is
. If each observation is divided by α, α ≠ 0, and then is increased by 10 then the mean of the new set is-
Options
A.
B.
C.
D.a
+ 10
More Progression (Sequence and Series) Questions
If a2 (b + c), b2 (c + a) , c2 (a+b) are in A.P., then a,b,c, are in-...If x,y,z are in G.P. then x2 + y2, xy + yz, y2 + z2 are in -...Let S1, S2...... be squares such that for each n ≥ the length of a side of Sn equals the lenght of a disgonal of S...If Sn denotes the sum of n terms of an A.P., then Sn+3 − 3Sn+2 + 3Sn+1 − Sn is equal to -...The S.D of the first n natural numbers is-...