Question
Download Solution PDFa2 - bc = α, b2 - ac = β, c2 - ab = γ எனில், \(\rm \frac{a \alpha+b \beta+c \gamma}{(a+b+c)(\alpha+\beta+\gamma)}\) இன் மதிப்பு என்ன?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFபயன்படுத்தப்படும் சூத்திரம்:
a3 + b3 + c3 - 3abc = (a + b +c)(a2 + b2 + c2 - ab - bc - ac)
கணக்கீடு:
a2 - bc = α ] × a
a3 - abc = aα ------(1)
b2 - ac = β ] × b
b3 - abc = bβ ------(2)
c2 - ab = γ ] × c
c3 - abc = cγ ------(3)
சமன்பாடு (1),(2) மற்றும் (3) ஆகிய்வற்றைக் கூட்டுதல்
a3 + b3 + c3 - 3abc = aα + bβ + cγ
a2 - bc + b2 - ac + c2 - ab = α + β + γ
⇒ \(\frac{a^3 + b^3 +c^3 -3abc}{(a+b+c)(a^2 +b^2 +c^2 - ab - bc -ca)}\) = \(\frac{a^3 + b^3 +c^3 -3abc}{a^3 + b^3 +c^3 -3abc}\)
∴ \(\frac{a^3 + b^3 +c^3 -3abc}{a^3 + b^3 +c^3 -3abc}\) = 1
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