Q. Solve for the exact value of x.log2(8x)−3log2(6)=0Answer:
Apply power rule: Apply the power rule of logarithms to the term 3log2(6). The power rule states that alogb(c)=logb(ca), where a is a constant, b is the base of the logarithm, and c is the argument of the logarithm. So, 3log2(6) becomes log2(63).
Rewrite equation: Rewrite the equation using the result from Step 1.log2(8x)−log2(63)=0
Combine logarithms: Combine the logarithms on the left side of the equation using the quotient rule.The quotient rule states that logb(m)−logb(n)=logb(nm), where b is the base of the logarithm, m and n are the arguments of the logarithm.So, log2(8x)−log2(63) becomes log2(638x).
Simplify argument: Simplify the argument of the logarithm. (638x) simplifies to (2168x).
Set equal to 20: Set the argument of the logarithm equal to 20, since the right side of the equation is 0 and log2(20)=0.log2(2168x)=log2(20)This implies that 2168x=20.
Solve for x: Solve for x.Since 20=1, we have (8x)/216=1.Multiplying both sides by 216 gives 8x=216.Dividing both sides by 8 gives x=216/8.
Calculate exact value: Calculate the exact value of x.x=8216x=27
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