Question

Select the correct answer from given alternatives.

If log (5x – 9) – log (x + 3) = log 2 then x = ...............

पर्याय

• 3

• 5

• 2

• 7

Answer 1

If log (5x – 9) – log (x + 3) = log 2 then x = 5

Explanation:

log (5x – 9) – log (x + 3) = log 2

`therefore (5x - 9)/(x + 3) = 2`

`therefore 3x = 9 + 6`

∴ x = 5