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1. $x + y = 2, x^{2} + y^{2} = 4$ হলে

A. $4$
B. $4$
C. $4$
D. $4$

Answer: Option B

Explanation:

x²+y²=(x+y)²-2xy

Or, xy=(4-4)/2=0

So,

x³+y³

=(x+y)³-3xy(x+y)

=2³-0

=8

(ans)

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