If x + 1/x = 5, then what is the value of x² + 1/x² = _____?
FPSC Past Papers / All — Multiple-choice practice
- A. 24
- B. 25
- C. 23
- D. None of these
Correct answer
23
Explanation
Explanation Given x + 1/x = 5 To find x² + 1/x²: (x + 1/x)² = x² + 2(x)(1/x) + 1/x² = x² + 2 + 1/x² x² + 1/x² = (x + 1/x)² - 2 = 5² - 2 = 25 - 2 = 23
Continue with All MCQs, explore all FPSC Past Papers topics, or try the All practice quiz.
More All questions
- Servant is making tea .
- ایف آئی اے کس انٹرنیشنل ادارے سے مل کر کام کرتی ہے ؟
- Where is Headquarter of Pakistan railways?
- In which Isotopes of hydrogen there are 1 proton and 2 neutron?
- Limited to quantitative description of pupils performance is _____?
- Which of these software applications was not part of the first version of Microsoft Office?
Found an error? Report a correction with this page URL and a supporting source.