单项选择题
设<img class="data-latex" data-id="" data-latex="y=lg5x" data-non-image="formula" height="28" src="data:image/png;base64,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" width="94">,则<img class="data-latex" data-id="" data-latex="dy=" data-non-image="formula" height="28" src="data:image/png;base64,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" width="62">( ).
(analysis)
.<img class="data-latex" data-id="" data-latex="\\frac {1} {5x}dx" data-non-image="formula" height="38" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAD0AAAAmCAYAAAB3c5OxAAAEQ0lEQVRoQ+3Yeah1YxQG8N8n8zwlQiQyDxkyZRZJmclckllEyZgpQ4Yi01+mTJEomTMnhZAxQxmKEJnHZOqpd9fu2Pfss8+9vu/c79z3v7PPu9+9nrXW86y13lnGcM0aQ8yGBb0CrsSJ+G66Oa4r6HlxC9bBSlhrHEBXQZ0Pb2OLcQK9IN6YAT15Yoc6C2AR/IHvJ39k8wldOV2dMtWRjja8WzPxLFw6t4OeH6kIT2M17IbH5nbQwTcPnsImWBefjgPoFfEZXsD2+HPUQC9RStYGU1iydsYTuBDn/V+Ac25XIYu6Xos9sRxew724DP8MYWicl/d+xPkFbD8+h/sLlSz4pXwvzxbGz4NmR1fQQ+BqfGVX3FYclw1n4xCsjDXxRcNbe+P+2vOdCu8/qD07EPe0GTknQKccXYxTcTWWLVRJ5kzE5/1xHbbChzgTlxRwW2IZPITnsQP+6gd8doM+GHfiZhyFv4tx+xWaNPF5KXxbMqCK6h54AJfjdPR7/z/4m0BHnKZ6vYkY/145eNOekhThCqeTsqnV9RX9OAJJ70o3AvY0bFuim/2LF21otb0J9HZYrPXNbhuSesfhhpKmJ9UAZHhJWq+CDfFlz9FxVlY1wqYbfAnLYz183c2U7urd9fz6/htxJA7C3bU/MqKmERm0Pq+Kj/FgiX5f/jYZPLs4XUUn1NkMr9SMqepzFDzilMhm2JioBFZ8zgXG9bVzIojfDFI620CHTxvh8TIBHV+UNxztsjI5vVyUujclq/ocPj+Lt0pHVk/bTGBVh1bxObN80jwr9T6OWnqQZqkNdGrnHeXgr3AAnuuCtuyN0QEU3qavTjOSlVStDI8z4pw4OHsCMr+fKTc0qd95Lw5ftIfPx2JjHD2IbW2gU2LSGnYWi4aPH4rbsWMBsnZxROpzeu5cQZ1RInZFeb8aOX8qJSv25G4uK6IXB+xSHJXpLFxvXW2gIzqPlBZvIsGI8RGjRCw83BzvN0xJ+dZFSHNSraR0ePh6efBRmbKqC4S0vfdh9/J/xC6UuwqH1TIwFacqh5MGHc9GccPHNfAobqqdmk4paRnAD5f/X8U5ffgVoUq/HLAVT9M7L1makN8brE4NThn9vCZU4W/68LSsVZPTCjgb2iK9TxGG8Kqad9M6phvK0J8+N2NgQLxTvJ/u6RScMOgAMJClU7ipDXTvp9LuHY69CuiUovTC6+NJrI7wb6RXP9BJw2NwDX4tKNL6bVNA11MqbWK4lszolGpzwjv9QCd6EY7caFTRC7AMBSkPFT0icJmp02reWpqLfZEObCRXW6Qzv6ZjCrD0yOF2lDOKmtvKjHQZEz8pghZe53k4/+JIIh5AyLYug3uAnVyGhQhZStO5uAB3lXqbUTHzbIBndBzZNYiQVdezPzRcwKeM/FZUOmUn2ZB9I70GAT3SAIYxbgb0MF6bju/MRHo6Rm0Ym8cy0v8CWL/qJ7Q4sSgAAAAASUVORK5CYII=" width="61">
.<img alt="Image" class="" data-id="21746" height="73" src="http://lms.ouchn.cn:80/api/uploads/21746/in-rich-contentcreated_at=2021-04-26T09:49:35Z" width="102">
.<img alt="Image" class="" data-id="21748" height="64" src="http://lms.ouchn.cn:80/api/uploads/21748/in-rich-contentcreated_at=2021-04-26T09:49:52Z" width="69">
.<img class="data-latex" data-id="" data-latex="\\frac {5} {x}dx" data-non-image="formula" height="38" src="data:image/png;base64,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" width="54">
出自:2024年国家开放大学答案