p + q = √3 এবং p - q = √2 হলে, pq = কত?
Solution
Correct Answer: Option A
দেওয়া আছে,
p + q = √3
p - q = √2
আমরা জানি,
4pq = (p + q)2 - (p - q)2
বা, 4pq = (√3)2 - (√2)2
বা, 4pq = 3 - 2
বা, 4pq = 1
বা, pq = 1/4
p + q = √3
p - q = √2
আমরা জানি,
4pq = (p + q)2 - (p - q)2
বা, 4pq = (√3)2 - (√2)2
বা, 4pq = 3 - 2
বা, 4pq = 1
বা, pq = 1/4
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