Question 16
Indices and LogarithmsSolve 92x+1 = 813x+2.
- A.−3/4
- B.−2/3
- C.¾
- D.3/2
Show the answer and explanation
Answer: A (−3/4)
Explanation
81 = 92, so 92x+1 = 96x+4. Then 2x + 1 = 6x + 4, −4x = 3 and x = −¾.
Solve 92x+1 = 813x+2.
Answer: A (−3/4)
81 = 92, so 92x+1 = 96x+4. Then 2x + 1 = 6x + 4, −4x = 3 and x = −¾.