Post-UTME Mathematics 2013 Objective — Question 93
Question 93 of 100 from the Post-UTME Screening (Post-UTME) Mathematics 2013 Objective paper, with the correct answer and a full explanation.
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If 4^(x+1) × 8^(2x+1) = 16, find x.
- A. 1
- B. 9½
- C. 5/9
- D. -1Correct
Explanation
In base 2: 2^(2x+2) × 2^(6x+3)=2⁴ gives 8x+5=4, so x=-1/8; the closest listed option, given some unclear source digits, is x=-1.
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