Solve ln(x + 1) = 2.
Answer and explanation
Correct answer: A. e^2 - 1
- Step 1: Apply the exponential: x + 1 = e^2.
- Step 2: x = e^2 - 1.
Answer
e^2 - 1.
Why not the others: After applying the exponential, 1 must be subtracted; the other answers forget it, add it, or mix up ln and exp.
Practise more Algebra and complex numbers.
Free questions with an explanation for every one, and full timed Bagrut (Secondary School Matriculation) mock tests.
More Algebra and complex numbers questions
- What is the modulus of the complex number z = 2 + 2i?
- What is the sum of the squares of the roots of x^2 - 3x - 4 = 0?
- Solve e^x = 3.
- What is the remainder when 2x^3 + 2x^2 + 5x + 2 is divided by (x - 2)?
- What is the sum of the roots of 3x^2 + 9x + 4 = 0?
- What is the sum of the squares of the roots of x^2 - 3x - 10 = 0?