Question 47Asked in BPSC TRE 1.0 (2023) Mathematics Class 11-12

If x + 1/x = 1, then the value of x²⁰⁰⁰ + 1/x²⁰⁰⁰ isयदि x + 1/x = 1, तो x²⁰⁰⁰ + 1/x²⁰⁰⁰ का मान है

यदि x + 1/x = 1, तो x²⁰⁰⁰ + 1/x²⁰⁰⁰ का मान है
  1. A00
  2. B11
  3. C22
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
Show answerHide answer

Correct answer: (E) None of the aboveउपर्युक्त में से कोई नहीं

Explanation

x + 1/x = 1 gives x² − x + 1 = 0, so x³ = −1 and x⁶ = 1. Since 2000 = 6·333 + 2, x²⁰⁰⁰ = x², so the value is x² + 1/x² = (x + 1/x)² − 2 = −1. This is not among (A)–(C), so the answer is (E).x + 1/x = 1 से x² − x + 1 = 0 मिलता है, इसलिए x³ = −1 और x⁶ = 1। चूँकि 2000 = 6·333 + 2, x²⁰⁰⁰ = x², अतः मान x² + 1/x² = (x + 1/x)² − 2 = −1 है। यह (A)–(C) में नहीं है, इसलिए उत्तर (E) है।

From BPSC TRE 1.0 (2023) Mathematics Class 11-12 — Previous Year Paper

This is question 47 of BPSC TRE 1.0 (2023) Mathematics Class 11-12 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.