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Sagot :
Let's solve the equation step by step.
Given:
[tex]\[ \log_2(6x - 8) - \log_2 8 = 1 \][/tex]
1. Apply the property of logarithms [tex]\(\log_b(a) - \log_b(c) = \log_b\left(\frac{a}{c}\right)\)[/tex] to combine the logarithms:
[tex]\[ \log_2\left(\frac{6x - 8}{8}\right) = 1 \][/tex]
2. Convert the logarithmic equation to its exponential form. Recall that if [tex]\(\log_b(A) = C\)[/tex], then [tex]\(b^C = A\)[/tex]. Here, [tex]\(b = 2\)[/tex], [tex]\(C = 1\)[/tex], and [tex]\(A = \frac{6x - 8}{8}\)[/tex]:
[tex]\[ 2^1 = \frac{6x - 8}{8} \][/tex]
3. Simplify the right-hand side of the equation:
[tex]\[ 2 = \frac{6x - 8}{8} \][/tex]
4. Clear the fraction by multiplying both sides of the equation by 8:
[tex]\[ 2 \times 8 = 6x - 8 \][/tex]
[tex]\[ 16 = 6x - 8 \][/tex]
5. Add 8 to both sides of the equation to isolate the term involving [tex]\(x\)[/tex]:
[tex]\[ 16 + 8 = 6x \][/tex]
[tex]\[ 24 = 6x \][/tex]
6. Divide both sides by 6 to solve for [tex]\(x\)[/tex]:
[tex]\[ x = \frac{24}{6} \][/tex]
[tex]\[ x = 4 \][/tex]
So, the value of [tex]\(x\)[/tex] that satisfies the equation is:
[tex]\[ \boxed{4} \][/tex]
Given:
[tex]\[ \log_2(6x - 8) - \log_2 8 = 1 \][/tex]
1. Apply the property of logarithms [tex]\(\log_b(a) - \log_b(c) = \log_b\left(\frac{a}{c}\right)\)[/tex] to combine the logarithms:
[tex]\[ \log_2\left(\frac{6x - 8}{8}\right) = 1 \][/tex]
2. Convert the logarithmic equation to its exponential form. Recall that if [tex]\(\log_b(A) = C\)[/tex], then [tex]\(b^C = A\)[/tex]. Here, [tex]\(b = 2\)[/tex], [tex]\(C = 1\)[/tex], and [tex]\(A = \frac{6x - 8}{8}\)[/tex]:
[tex]\[ 2^1 = \frac{6x - 8}{8} \][/tex]
3. Simplify the right-hand side of the equation:
[tex]\[ 2 = \frac{6x - 8}{8} \][/tex]
4. Clear the fraction by multiplying both sides of the equation by 8:
[tex]\[ 2 \times 8 = 6x - 8 \][/tex]
[tex]\[ 16 = 6x - 8 \][/tex]
5. Add 8 to both sides of the equation to isolate the term involving [tex]\(x\)[/tex]:
[tex]\[ 16 + 8 = 6x \][/tex]
[tex]\[ 24 = 6x \][/tex]
6. Divide both sides by 6 to solve for [tex]\(x\)[/tex]:
[tex]\[ x = \frac{24}{6} \][/tex]
[tex]\[ x = 4 \][/tex]
So, the value of [tex]\(x\)[/tex] that satisfies the equation is:
[tex]\[ \boxed{4} \][/tex]
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