https://booktoan.com Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online Tue, 07 Jul 2020 13:45:54 +0000 vi hourly 1 https://wordpress.org/?v=7.1.2 https://booktoan.com/phat-trien-cau-11-de-tot-nghiep-thpt-2020-rut-gon-logarit.html https://booktoan.com/phat-trien-cau-11-de-tot-nghiep-thpt-2020-rut-gon-logarit.html#respond Tue, 07 Jul 2020 13:45:54 +0000 https://booktoan.com/?p=173351 https://booktoan.com/phat-trien-cau-11-de-tot-nghiep-thpt-2020-rut-gon-logarit.html/feed 0 https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41cho-ab-0-thoa-man-log-_16a-log-_20b-log-_25frac2a-b3-gia-tri-cua-fracab-bang.html https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41cho-ab-0-thoa-man-log-_16a-log-_20b-log-_25frac2a-b3-gia-tri-cua-fracab-bang.html#respond Tue, 21 Apr 2020 08:31:51 +0000 https://booktoan.com/?p=173050 0\) thỏa mản \({\log _{16}}a = {\log _{20}}b = {\log _{25}}\frac{{2a – b}}{3}.\)Giá trị của \(\frac{a}{b}\) bằng \(\frac{5}{4}\). B. \(\frac{3}{2}\). C. \(\frac{2}{3}\). D. \(\frac{4}{5}\) Lời giải Đặt \(t = {\log _{16}}a = {\log _{20}}b = {\log _{25}}\frac{{2a – b}}{3}.\) \( \Leftrightarrow \left\{ \begin{array}{l}a = {16^t}\\b = […]]]> https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41cho-ab-0-thoa-man-log-_16a-log-_20b-log-_25frac2a-b3-gia-tri-cua-fracab-bang.html/feed 0 https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41cho-ab-0-thoa-man-log-_sqrt-10-a-log-_sqrt-15-b-log-_5left-a-b-right-gia-tri-cua-fracba-bang.html https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41cho-ab-0-thoa-man-log-_sqrt-10-a-log-_sqrt-15-b-log-_5left-a-b-right-gia-tri-cua-fracba-bang.html#respond Tue, 21 Apr 2020 08:31:51 +0000 https://booktoan.com/?p=173051 0\) thỏa mản \({\log _{\sqrt {10} }}a = {\log _{\sqrt {15} }}b = {\log _5}\left( {a + b} \right).\)Giá trị của \(\frac{b}{a}\) bằng \(\frac{b}{a} = \frac{1}{2}\). B. \(\frac{b}{a} = \frac{1}{3}\). C. \(\frac{b}{a} = \frac{3}{2}\). D. \(\frac{b}{a} = \frac{2}{3}\) Lời giải Đặt \(t = {\log _{\sqrt {10} […]]]> https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41cho-ab-0-thoa-man-log-_sqrt-10-a-log-_sqrt-15-b-log-_5left-a-b-right-gia-tri-cua-fracba-bang.html/feed 0 https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41-cho-ab-0-thoa-man-log-4a-log-6b-log-9left-a-b-right-gia-tri-cua-fracab-bang.html https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41-cho-ab-0-thoa-man-log-4a-log-6b-log-9left-a-b-right-gia-tri-cua-fracab-bang.html#respond Tue, 21 Apr 2020 07:28:56 +0000 https://booktoan.com/?p=173030 https://booktoan.com/trac-nghiem-vd-vdc-toan-2020-cau-41-cho-ab-0-thoa-man-log-4a-log-6b-log-9left-a-b-right-gia-tri-cua-fracab-bang.html/feed 0 https://booktoan.com/cau-41-mh-toan-2020-cho-x-y-la-cac-so-thuc-duong-thoa-man-log-_9x-log-_6y-log-_42x-y-gia-tri-cua-fracxy-bang.html https://booktoan.com/cau-41-mh-toan-2020-cho-x-y-la-cac-so-thuc-duong-thoa-man-log-_9x-log-_6y-log-_42x-y-gia-tri-cua-fracxy-bang.html#respond Mon, 06 Apr 2020 19:00:13 +0000 https://booktoan.com/cau-41-mh-toan-2020-cho-x-y-la-cac-so-thuc-duong-thoa-man-log-_9x-log-_6y-log-_42x-y-gia-tri-cua-fracxy-bang.html https://booktoan.com/cau-41-mh-toan-2020-cho-x-y-la-cac-so-thuc-duong-thoa-man-log-_9x-log-_6y-log-_42x-y-gia-tri-cua-fracxy-bang.html/feed 0 https://booktoan.com/de-bai-tim-dao-ham-cua-ham-so-y-log-_2x2-1.html https://booktoan.com/de-bai-tim-dao-ham-cua-ham-so-y-log-_2x2-1.html#respond Thu, 30 May 2019 03:03:14 +0000 https://booktoan.com/de-bai-tim-dao-ham-cua-ham-so-y-log-_2x2-1.html https://booktoan.com/de-bai-tim-dao-ham-cua-ham-so-y-log-_2x2-1.html/feed 0 https://booktoan.com/de-bai-cho-biet-log-_257-a-va-log-_25-b-tinh-log-_sqrt35frac498-theo-ab.html https://booktoan.com/de-bai-cho-biet-log-_257-a-va-log-_25-b-tinh-log-_sqrt35frac498-theo-ab.html#respond Thu, 30 May 2019 03:03:14 +0000 https://booktoan.com/de-bai-cho-biet-log-_257-a-va-log-_25-b-tinh-log-_sqrt35frac498-theo-ab.html https://booktoan.com/de-bai-cho-biet-log-_257-a-va-log-_25-b-tinh-log-_sqrt35frac498-theo-ab.html/feed 0 https://booktoan.com/de-bai-voi-dieu-kien-cac-bieu-thuc-trong-cac-khang-dinh-sau-co-nghia-chon-khang-dinh-dung.html https://booktoan.com/de-bai-voi-dieu-kien-cac-bieu-thuc-trong-cac-khang-dinh-sau-co-nghia-chon-khang-dinh-dung.html#respond Thu, 30 May 2019 03:03:14 +0000 https://booktoan.com/de-bai-voi-dieu-kien-cac-bieu-thuc-trong-cac-khang-dinh-sau-co-nghia-chon-khang-dinh-dung.html https://booktoan.com/de-bai-voi-dieu-kien-cac-bieu-thuc-trong-cac-khang-dinh-sau-co-nghia-chon-khang-dinh-dung.html/feed 0 https://booktoan.com/de-bai-tim-tap-nghiem-t-cua-bat-phuong-trinh-log-_pi-3x-4-log-_pi-x-1.html https://booktoan.com/de-bai-tim-tap-nghiem-t-cua-bat-phuong-trinh-log-_pi-3x-4-log-_pi-x-1.html#respond Thu, 30 May 2019 03:03:14 +0000 https://booktoan.com/de-bai-tim-tap-nghiem-t-cua-bat-phuong-trinh-log-_pi-3x-4-log-_pi-x-1.html {\log _\pi }(x – 1).\) A. \(T = \left( {\frac{3}{2}; + \infty } \right B. \(T = \left( {1;\frac{3}{2}} \right)\) C. \(T = (1; + \infty )\) D. \(T = \left( {\frac{4}{3};\frac{3}{2}} \right)\) Hãy chọn trả lời đúng […]]]> https://booktoan.com/de-bai-tim-tap-nghiem-t-cua-bat-phuong-trinh-log-_pi-3x-4-log-_pi-x-1.html/feed 0 https://booktoan.com/de-bai-tinh-gia-tri-cua-bieu-thuc-b-log-_2left-2sin-fracpi-12-right-log-_2left-rmcosfracpi-12-right.html https://booktoan.com/de-bai-tinh-gia-tri-cua-bieu-thuc-b-log-_2left-2sin-fracpi-12-right-log-_2left-rmcosfracpi-12-right.html#respond Thu, 30 May 2019 03:03:14 +0000 https://booktoan.com/de-bai-tinh-gia-tri-cua-bieu-thuc-b-log-_2left-2sin-fracpi-12-right-log-_2left-rmcosfracpi-12-right.html https://booktoan.com/de-bai-tinh-gia-tri-cua-bieu-thuc-b-log-_2left-2sin-fracpi-12-right-log-_2left-rmcosfracpi-12-right.html/feed 0