thank u bhaiyya
If A and G be A.M & G.m respectively between two positive numbers,prove that the numbers
A±√(A+G)(A-G)
-
UP 0 DOWN 0 0 3
3 Answers
Manish Shankar
·2009-04-03 01:43:37
let the numbers be a and b
(a+b)/2=A
√(ab)=G or ab=G2 or b=G2/a
a+b=2A
a+(G2/a)=2A
a2-2Aa+G2=0
a=A±√(A+G)(A-G)