Question

Select the correct answer from given alternatives.

Find x, if 2log₂ x = 4

Options

• 4, −4

• 4

• −4

• not defined

Answer 1

4

Explanation:

2 log₂ x = 4, x > 0

∴ log₂ (x²) = 4

∴ x² = 16

∴ x = ± 4

∴ x = 4