If 3loga + 5loga - 6loga = log64, what is a?

  • A 4
  • B 6
  • C 8
  • D 16
  • E 32
waec 1989mathematics

The correct answer is C. 8

loga3 + loga5 - loga6

log(a3 * a5/a6) = loga64

a2 = 64 a = 8

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