Question 6
LogarithmsIf 2 log3y + log3x2 = 4, then y is
- A.(4 − log3x2)/2
- B.4/log3x2
- C.2/x
- D.9/x
Show the answer and explanation
Answer: D (9/x)
Explanation
2 log3y + log3x² = log3(x²y²) = 4, so x²y² = 34 = 81. Then xy = 9 and y = 9/x.
If 2 log3y + log3x2 = 4, then y is
Answer: D (9/x)
2 log3y + log3x² = log3(x²y²) = 4, so x²y² = 34 = 81. Then xy = 9 and y = 9/x.