log\(2\sqrt 5 \) 400 = x হলে x এর মান কত ?
Correct Answer: Option B
log\(2\sqrt 5 \) 400 = x
বা, \((2\sqrt 5 )\)x = 400
বা, \((2\sqrt 5 )\)x = 16 \( \times \)25
বা, \((2\sqrt 5 )\)x =24 \( \times \)52
বা, \((2\sqrt 5 )\)x = 2\( \times \)\((\sqrt 5 )\)4
বা, \((2\sqrt 5 )\)x = \((2\sqrt 5 )\)4
বা, x = 4
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