JAMB Mathematics 2009 Objective — Question 7
Question 7 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2009 Objective paper, with the correct answer and a full explanation.
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Solve 5^(2(x-1)) x 5^(x+1) = 0.04
- A. 1/3
- B. 1/4
- C. -1/5
- D. -1/3Correct
Explanation
5^(2x-1) x 5^(x+1) = 4/100 = 1/25 = 5^-2. 3x-1=-2. 3x=-1. x=-1/3.
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