Hello,

can any one help me in solving the folowing problem please???

i'm in hurry please help me if it's possible

show that if is a set of real numbers

such that

then the quantity

is minimized when

the problem give some hint for solution:

assume that

and show that this contradics the assumption that

minimize the sum of squares.to do this show that replacing each by

reduces the sum of squares while insuring

thanks.