Engineering Board Exam Reviewer · Logarithms · medium

Solve x+ (x-3)=1 (common logarithms).

1. -2
2. 10
3. 5
4. 2

Answer

C. 5

Solution

[x(x-3)]=1 x2-3x=10 (x-5)(x+2)=0. The argument x-3 must be positive, so x=5.

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