{"id":2351,"date":"2026-05-18T18:49:48","date_gmt":"2026-05-18T18:49:48","guid":{"rendered":"https:\/\/mcqacademy.com\/zh\/mcq\/logarithmic-equation-solution-19\/"},"modified":"2026-05-18T18:49:48","modified_gmt":"2026-05-18T18:49:48","slug":"logarithmic-equation-solution-19","status":"publish","type":"mcq","link":"https:\/\/mcqacademy.com\/zh\/mcq\/logarithmic-equation-solution-19\/","title":{"rendered":"\u5bf9\u6570\u65b9\u7a0b\u6c42\u89e3 19"},"content":{"rendered":"<p>\u6c42\u89e3\u65b9\u7a0b log_5(x + 7) = 2\uff0c\u6c42 x\u3002<\/p>\n\n<ul class=\"quiz-options wp-block-list\">\n<li>-2<\/li>\n<li>18<\/li>\n<li>25<\/li>\n<li>3<\/li>\n<\/ul>\n","protected":false},"author":39,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","topic":[1079,1111,1110],"subject":[1080],"education_level":[5],"class_list":["post-2351","mcq","type-mcq","status-publish","hentry","topic-algebra","topic-exponential-form","topic-logarithmic-equations","subject-algebra","education_level-hsc"],"mcq_note":"\u628a\u5bf9\u6570\u65b9\u7a0b\u8f6c\u5316\u4e3a\u6307\u6570\u5f62\u5f0f\u3002log_5(x + 7) = 2 \u8868\u793a x + 7 = 5^2\u3002\u73b0\u5728\u8ba1\u7b97 5^2 = 25\uff0c\u6240\u4ee5 x + 7 = 25\u3002\u4e24\u8fb9\u540c\u65f6\u51cf\u53bb 7\uff1ax = 25 - 7 = 18\u3002\u6700\u540e\u68c0\u67e5\u5b9a\u4e49\u57df\uff1ax + 7 \u5fc5\u987b\u4e3a\u6b63\uff0c\u5e76\u4e14 18 + 7 = 25 &gt; 0\uff0c\u6240\u4ee5\u7b54\u6848\u6709\u6548\u3002","mcq_options":[{"right":"no","answer":"-2"},{"right":"yes","answer":"18"},{"right":"no","answer":"25"},{"right":"no","answer":"3"}],"multi_answers":"no","subject_terms":[{"id":1080,"title":"Algebra","slug":"algebra"}],"topic_terms":[{"id":1079,"title":"Algebra","slug":"algebra"},{"id":1111,"title":"Exponential Form","slug":"exponential-form"},{"id":1110,"title":"Logarithmic Equations","slug":"logarithmic-equations"}],"_links":{"self":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/mcq\/2351","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/mcq"}],"about":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/types\/mcq"}],"author":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/comments?post=2351"}],"wp:attachment":[{"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/media?parent=2351"}],"wp:term":[{"taxonomy":"topic","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/topic?post=2351"},{"taxonomy":"subject","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/subject?post=2351"},{"taxonomy":"education_level","embeddable":true,"href":"https:\/\/mcqacademy.com\/zh\/wp-json\/wp\/v2\/education_level?post=2351"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}