Pembahasan

$fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space log invisible function application b over denominator open parentheses log invisible function application a c close parentheses open parentheses log presubscript space presuperscript a invisible function application b close parentheses open parentheses log presubscript space presuperscript c invisible function application b close parentheses end fraction equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space log invisible function application b log presubscript space presuperscript b invisible function application c over denominator open parentheses log invisible function application a c close parentheses open parentheses log presubscript space presuperscript a invisible function application b close parentheses end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space log invisible function application c over denominator open parentheses log invisible function application a c close parentheses open parentheses log presubscript space presuperscript a invisible function application b close parentheses end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator log presubscript space presuperscript c invisible function application 10. space to the power of 10 log invisible function application a c. log presubscript space presuperscript a invisible function application b end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator log presubscript space presuperscript c invisible function application a c. log presubscript space presuperscript a invisible function application b end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator open parentheses log presubscript space presuperscript c invisible function application a plus log presubscript space presuperscript c invisible function application c close parentheses log presubscript space presuperscript a invisible function application b end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator left parenthesis log presubscript space presuperscript c invisible function application a plus 1 right parenthesis log presubscript space presuperscript a invisible function application b end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator open parentheses log presubscript space presuperscript c invisible function application a. log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript a invisible function application b close parentheses end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator open parentheses log presubscript space presuperscript c invisible function application b plus log presubscript space presuperscript a invisible function application b close parentheses end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals fraction numerator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses space over denominator open parentheses log presubscript space presuperscript a invisible function application b plus log presubscript space presuperscript c invisible function application b close parentheses end fraction space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 1$