Question
Download Solution PDFபின்வரும் கூற்றுகளில் எது சரியானது?
I.
II.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFகொடுக்கப்பட்டது:
k + 1/k = 12
பயன்படுத்தப்படும் சூத்திரம்:
(x + 1/x)2 = (x2 + 1/x2) + 2
(a - b)(a + b) = a2 - b2
கணக்கீடு:
முதல் கூற்றை எடுத்துக் கொள்ளுங்கள்
k + 1/k = 12
பயன்படுத்தி
(x + 1/x)2 = (x2 + 1/x2) + 2
(k2 + 1/k2) = 144 - 2
(k2 + 1/k2) = =142
எனவே, முதல் கூற்று உண்மை.
இரண்டாவது கூற்றை எடுத்துக் கொள்ளுங்கள்
(a - b)(a + b) = a2 - b2 ஐப் பயன்படுத்துதல்
எனவே, இரண்டாவது கூற்று உண்மையல்ல.
எனவே கூற்று I மட்டுமே உண்மை.
∴ விருப்பம் 1 சரியான பதில்.
Mistake Points
குறிப்பு எடுக்கவேண்டியது,
(K4)2 = K4 * 2 = K8
எனவே கூற்று 2 சரியல்ல.
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