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বর্গসংখ্যা 49 এবং 36-এর মধ্যে পার্থক্য কত?

A13
B12
C11
D14
Answer & Solution
Correct answer: A. 13
দুটি ক্রমিক বর্গসংখ্যা n² এবং (n-1)²-এর মধ্যে পার্থক্য হলো 2n - 1, যা n = 7-এর জন্য 13।
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