2 × 43x - 5 = 512 হলে x এর মান-
Solution
Correct Answer: Option B
2 × 43x - 5 = 512
⇒ 2 × (22)3x - 5 = 29
⇒ 2 × 26x - 10 = 29
⇒ 26x - 10 + 1 = 29
⇒ 26x - 9 = 29
⇒ 6x - 9 = 9
⇒ 6x = 9 + 9
⇒ 6x = 18
∴ x = 3
⇒ 2 × (22)3x - 5 = 29
⇒ 2 × 26x - 10 = 29
⇒ 26x - 10 + 1 = 29
⇒ 26x - 9 = 29
⇒ 6x - 9 = 9
⇒ 6x = 9 + 9
⇒ 6x = 18
∴ x = 3
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