Easy
1 point
ID: #26565
Question
a+b = 5, a-b = 3 হলে ab এর মান কত?
Options
1
5
Correct Answer
2
2
Correct Answer
3
3
Correct Answer
4
4
Correct Answer
Explanation
ab = {(a+b)/2}² - {(a-b)/2}² = (5/2)² - (3/2)² = (25/4) - (9/4) = 16/4 = 4। অথবা, 2a = 8 => a=4, b=1 => ab=4।
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Type
Single Choice
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