RRB Technician Grade 3 previous year question
If x² + 1/x² = 16 and x ≠ 0, then what is the value of x⁴ + 1/x⁴?
Asked in RRB Technician Grade 3 (06 Mar 2026 Shift 2) · Quantitative Aptitude
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Correct answer: (A) 254
Squaring x2+1/x2=16 gives x4+1/x4+2=256, so x4+1/x4=254.
हिंदी में प्रश्न
यदि x² + 1/x² = 16 है और x ≠ 0 है, तो x⁴ + 1/x⁴ का मान ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 254
x²+1/x²=16 का वर्ग करने पर x⁴+1/x⁴+2=256, अतः x⁴+1/x⁴=254।
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