যদি x − \(\rm\frac{1}{x}\) = 3 হয়, তাহলে x3 − \(\rm\frac{1}{x^3}\) এর মান কত হবে? 

This question was previously asked in
Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
View all Bihar STET Papers >
  1. 36
  2. 63
  3. 99
  4. কোনটিই নয় 

Answer (Detailed Solution Below)

Option 1 : 36
Free
Bihar STET Paper 1 Mathematics Full Test 1
13.9 K Users
150 Questions 150 Marks 150 Mins

Detailed Solution

Download Solution PDF

প্রদত্ত:

x - 1/x = 3

অনুসৃত ধারণা:

a3 - b3 = (a - b)3 + 3ab(a - b)

গণনা:

প্রদত্ত পরিচয় প্রয়োগ করে: 
  
⇒ x3 - (1/x)3 = (x - 1/x)3 + 3(x × 1/x)(x - 1/x)

⇒ x3 - (1/x)3 = (3)3 + 3(1)(3)

⇒ x3 - (1/x)3 = 27 + 9

⇒ x3 - (1/x)3 = 36

∴ x3 - (1/x)3 এর মান হল 36 

Latest Bihar STET Updates

Last updated on Jan 29, 2025

-> The Bihar STET 2025 Notification will be released soon.

->  The written exam will consist of  Paper-I and Paper-II  of 150 marks each. 

-> The candidates should go through the Bihar STET selection process to have an idea of the selection procedure in detail.

-> For revision and practice for the exam, solve Bihar STET Previous Year Papers.

Get Free Access Now
Hot Links: teen patti master app master teen patti teen patti master apk best