JAMB Mathematics 1983 Question 22

Question 22

Logarithms

Simplify log10 a⅓ + ¼log10a − 1/12log10a7

  1. A.1
  2. B.7/6 log10a
  3. C.0
  4. D.10
  5. E.a.
Show the answer and explanation

Answer: C (0)

Explanation

Write each term as a multiple of log a: (1/3 + 1/4 − 7/12) log a = (4 + 3 − 7)/12 × log a = 0.