For non-negative integers a, b, c; what would be the value of a + b + c if log(a) + log(b) + log(c) = 0? A. 3 B. 1 C. 0 D. -1
GATE 2018 · General Aptitude · Logarithms · medium
Answer: a + b + c = 3
- Apply product rule: log(abc) = 0
- Solve log(abc) = 0: abc = 1
- Find non-negative integer solutions to abc = 1: Only solution: a = 1, b = 1, c = 1
- Compute the sum: a + b + c = 3