1.

If a,b,c,d and p are distinct real numbers such that (a​​​​​​2+b​​​​​​2+c​​​​​​2)p​2​​​​​ -2(ab+bc+cd)p+(b2​​​​​2+c​​​​​​2+d​​​​​​2)

Answer» If a,b,c,d and p are distinct real numbers such that
(a​​​​​​2+b​​​​​​2+c​​​​​​2)p​2​​​​​ -2(ab+bc+cd)p+(b2​​​​​2+c​​​​​​2+d​​​​​​2)<=0,then a,b,c,d are in


a) GP
b)AP
c)HP
d)None of these


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