x + y=2, x2 +y2=4 হলে, x3+y3= কত?
Solution
Correct Answer: Option D
দেওয়া আছে,
x + y = 2
x + y = 2
এবং x² + y² = 4
⇒ (x + y)² + 2xy = 4
⇒ 2² + 2xy = 4
⇒ 4 + 2xy = 4
⇒ 2xy = 0
⇒ xy = 0
প্রদত্ত রাশি,
x³ + y³
= (x + y)³ - 3xy(x + y)
= 2³ - 3.0.2
= 8 - 0
= 8
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions