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1. x+y=2,x2+y2=4 হলে
- A.
- B.
- C.
- D.
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)
Post your comments here:
1. x+y=2,x2+y2=4 হলে
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)
Post your comments here: