Solve the equation in each of the following.4log2x - log25 = log2125

4log2x - log25 = log2125⇒ log2x4 - log25 = log2125⇒ ⇒ ⇒ x4 = 5×125 = 5×53 = 54⇒ x = 5

Q7 of 124 Page 29

Solve the equation in each of the following.
4log₂x - log₂5 = log₂125

⇒ log₂x⁴ - log₂5 = log₂125

⇒

⇒ x⁴ = 5×125 = 5×5³ = 5⁴

⇒ x = 5

Solve the equation in each of the following.

log₄(8log₂x) = 2

Solve the equation in each of the following.

log₁₀5 + log₁₀(5x + 1) = log₁₀(x + 5) + 1

Solve the equation in each of the following.

log₃25 + log₃x = 3log₃5

Solve the equation in each of the following.

Questions · 124

2. Scientific notations of real numbers and logarithms

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