Question
Question: If a, b, c, d are four positive numbers then –...
If a, b, c, d are four positive numbers then –
A
³ 4
B
³ 4
C
ba+cb+dc+ed+ae ³ 5
D
All three correct
Answer
All three correct
Explanation
Solution
As A.M. ³ G.M.
dc⋅ed
\
³
c/e =
(cb+ed) ³
Also 5ba+cb+dc+ed+ae ³ ³ 1
³ 5