Question 3
Indices and LogarithmsSolve 4(2x²) = 8x.
- A.1 and 2
- B.1 and −2
- C.−1 and 2
- D.−1 and −2
Show the answer and explanation
Answer: A (1 and 2)
Explanation
2^(2 + x²) = 2^(3x), so x² − 3x + 2 = 0, (x − 1)(x − 2) = 0: x = 1 or 2.
Solve 4(2x²) = 8x.
Answer: A (1 and 2)
2^(2 + x²) = 2^(3x), so x² − 3x + 2 = 0, (x − 1)(x − 2) = 0: x = 1 or 2.