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Question
যদি x =y=2x এবং xyz=256 হয় তবে x এর মান কত?
16
12
8
4
ANSWER : 3
Descrption
<p>x = y = 2a.</p> <p> </p> <p>অতএব, x.y.z = 2z. 2z . z = 4z^3 = 256.</p> <p> </p> <p>অতএব, z^3 = 256/4 = 64</p> <p> </p> <p>অতএব, z = ((64)^1/3</p> <p> </p> <p>বা, z = ( 4^3 ) ^1/3 = 4.</p> <p> </p> <p>অতএব, y = 2z = 2.4 = 8.</p>
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