x+y=2, x2+y2=4, x3+y3এর মান নির্ণয় করুন।
Solution
Correct Answer: Option C
আমরা জানি,
(x+ y)2 = x2 + 2xy + y2
⇒ 22=4+2xy
⇒ 4 = 4+2xy
⇒ 2xy = 0
xy=0
আবার,
(x+ y)2 = x2 + 2xy + y2
⇒ 22=4+2xy
⇒ 4 = 4+2xy
⇒ 2xy = 0
xy=0
আবার,
(x+y)3= x3 + y3+ 3xy(x+y)
⇒(2)3 = x3 + y3+ 3 × 0 × 2
⇒ 8 = x3 + y3
x3 + y3 =8Practice More Questions on Our App!
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