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ID#4820 BCS General Math Preli

$\log_x4 = –2$ হলে x = কত?
ক) 1/2
খ) –1/2
গ) 2
ঘ) –2

ব্যাখ্যা

$\log_x 4$ = -2
বা, $x^{-2}$ = 4
বা, $\frac{1}{x^2}$ = 4
বা, $4x^2$ = 1
বা, $x^2 = \frac{1}{4}$
বা, $x = \sqrt{\frac{1}{4}}$
বা, $x = \frac{1}{2}$ (ভিত্তি ঋণাত্মক হয় না)
Resource Details
Exam BCS
Subject General Math
Chapter 14

Discussion — BCS General Math Preli

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