Question 7
LogarithmsGiven that a = log 7 and b = log 2, express log 35 in terms of a and b.
- A.a + b + 1
- B.ab − 1
- C.a − b + 1
- D.b − a + 1
Show the answer and explanation
Answer: C (a − b + 1)
Explanation
log 35 = log(7 × 10/2) = log 7 + log 10 − log 2 = a + 1 − b.