Question 8
Indices and LogarithmsIf √(2(x − 1)3) − 4 = 0, find the value of x.
- A.3
- B.2
- C.−2
- D.−3
Show the answer and explanation
Answer: A (3)
Explanation
√(2(x − 1)³) = 4, so 2(x − 1)³ = 16 and (x − 1)³ = 8. Then x − 1 = 2, so x = 3.
If √(2(x − 1)3) − 4 = 0, find the value of x.
Answer: A (3)
√(2(x − 1)³) = 4, so 2(x − 1)³ = 16 and (x − 1)³ = 8. Then x − 1 = 2, so x = 3.