Sách Toán – Học Toán – Đề Thi Toán

Sách Toán – Học Toán – Đề Thi Toán https://booktoan.com Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online Tue, 13 Jul 2021 00:01:47 +0000 vi hourly 1 https://wordpress.org/?v=7.1.3 Đề: Với các giá trị nào của $m$ thì hàm số : $y = {2^{\log_3\left[ {\left( {m + 1} \right)x^2- 2\left( {m – 1} \right)x + 2m – 1} \right]}}$ xác định với mọi $x \in R$ https://booktoan.com/de-voi-cac-gia-tri-nao-cua-m-thi-ham-so-y-2log_3left-left-m-1-rightx2-2left-m-1-rightx-2m-1-right-xac-dinh-voi-moi-x-in-r.html https://booktoan.com/de-voi-cac-gia-tri-nao-cua-m-thi-ham-so-y-2log_3left-left-m-1-rightx2-2left-m-1-rightx-2m-1-right-xac-dinh-voi-moi-x-in-r.html#respond Fri, 13 Mar 2020 16:27:32 +0000 https://booktoan.com/de-voi-cac-gia-tri-nao-cua-m-thi-ham-so-y-2log_3left-left-m-1-rightx2-2left-m-1-rightx-2m-1-right-xac-dinh-voi-moi-x-in-r.html 0(*) \forall x\in R (1)$Ta có: […]]]> https://booktoan.com/de-voi-cac-gia-tri-nao-cua-m-thi-ham-so-y-2log_3left-left-m-1-rightx2-2left-m-1-rightx-2m-1-right-xac-dinh-voi-moi-x-in-r.html/feed 0 Đề: Tìm tập xác định của mỗi hàm số sau:a) $y=\sqrt{x-2\sqrt{x-1}}$ b) $y=\sqrt{|x-2|+3x-x^2-1}$c) $y=\frac{1}{\sqrt{12x-4x^2-9}}$ d) $y=\sqrt{2x-3x^2-1}$ https://booktoan.com/de-tim-tap-xac-dinh-cua-moi-ham-so-saua-ysqrtx-2sqrtx-1.html https://booktoan.com/de-tim-tap-xac-dinh-cua-moi-ham-so-saua-ysqrtx-2sqrtx-1.html#respond Thu, 12 Mar 2020 22:30:27 +0000 https://booktoan.com/de-tim-tap-xac-dinh-cua-moi-ham-so-saua-ysqrtx-2sqrtx-1.html https://booktoan.com/de-tim-tap-xac-dinh-cua-moi-ham-so-saua-ysqrtx-2sqrtx-1.html/feed 0 Đề: Tìm tập xác định của hàm số: $y=\frac{\tan x+\cot x}{\cos 2x}$ https://booktoan.com/de-tim-tap-xac-dinh-cua-ham-so-yfractan-xcot-xcos-2x.html https://booktoan.com/de-tim-tap-xac-dinh-cua-ham-so-yfractan-xcot-xcos-2x.html#respond Thu, 12 Mar 2020 13:00:28 +0000 https://booktoan.com/de-tim-tap-xac-dinh-cua-ham-so-yfractan-xcot-xcos-2x.html https://booktoan.com/de-tim-tap-xac-dinh-cua-ham-so-yfractan-xcot-xcos-2x.html/feed 0 Đề: Cho hàm số : $f(x) = \sqrt {{sin^4}x + {cos ^4}x – 2msinxcos x} $Tìm các giá trị của m để $f(x)$ xác định với mọi $x.$ https://booktoan.com/de-cho-ham-so-fx-sqrt-sin4x-cos-4x-2msinxcos-x-tim-cac-gia-tri-cua-m-de-fx-xac-dinh-voi-moi-x.html https://booktoan.com/de-cho-ham-so-fx-sqrt-sin4x-cos-4x-2msinxcos-x-tim-cac-gia-tri-cua-m-de-fx-xac-dinh-voi-moi-x.html#respond Wed, 11 Mar 2020 19:55:21 +0000 https://booktoan.com/de-cho-ham-so-fx-sqrt-sin4x-cos-4x-2msinxcos-x-tim-cac-gia-tri-cua-m-de-fx-xac-dinh-voi-moi-x.html https://booktoan.com/de-cho-ham-so-fx-sqrt-sin4x-cos-4x-2msinxcos-x-tim-cac-gia-tri-cua-m-de-fx-xac-dinh-voi-moi-x.html/feed 0 Đề: Xác định $m$ để các hàm số sau có tập xác định là $R$a) $f(x)=\sqrt{(m-2)x^2+(m-2)x+4}$ b) $g(x)=\frac{x^2+mx-m}{x^2-2mx+m+2}$ https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-co-tap-xac-dinh-la-ra-fxsqrtm-2x2m-2x4-b-gxfracx2mx-mx2-2.html https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-co-tap-xac-dinh-la-ra-fxsqrtm-2x2m-2x4-b-gxfracx2mx-mx2-2.html#respond Wed, 11 Mar 2020 09:56:45 +0000 https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-co-tap-xac-dinh-la-ra-fxsqrtm-2x2m-2x4-b-gxfracx2mx-mx2-2.html https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-co-tap-xac-dinh-la-ra-fxsqrtm-2x2m-2x4-b-gxfracx2mx-mx2-2.html/feed 0 Đề: Xác định $m$ để các hàm số sau đấy xác định với mọi $x>0$a) $y=\sqrt{x-m}+\sqrt{2x-m-1}$ b) $y=\sqrt{2x-3m+4}+\frac{x-m}{x+m-1}$ https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-day-xac-dinh-voi-moi-x0a-ysqrtx-msqrt2x-m-1.html https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-day-xac-dinh-voi-moi-x0a-ysqrtx-msqrt2x-m-1.html#respond Tue, 10 Mar 2020 04:07:35 +0000 https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-day-xac-dinh-voi-moi-x0a-ysqrtx-msqrt2x-m-1.html 0$a) $y=\sqrt{x-m}+\sqrt{2x-m-1}$ b) $y=\sqrt{2x-3m+4}+\frac{x-m}{x+m-1}$ Lời giải Giảia) Hàm số $y$ xác định $\Leftrightarrow \begin{cases}x-m \geq 0 \\ 2x-m-1 \geq 0 \end{cases} \Leftrightarrow \begin{cases}x \geq m (1) \\ x \geq \frac{m+1}{2} (2) \end{cases}$Do đó để […]]]> https://booktoan.com/de-xac-dinh-m-de-cac-ham-so-sau-day-xac-dinh-voi-moi-x0a-ysqrtx-msqrt2x-m-1.html/feed 0 Đề: Định $m$ để hàm số :$y=\sqrt{mx-2m+1}+\sqrt{2x+m-2} $ xác định khi $x \geq 1$ https://booktoan.com/de-dinh-m-de-ham-so-ysqrtmx-2m1sqrt2xm-2-xac-dinh-khi-x-geq-1.html https://booktoan.com/de-dinh-m-de-ham-so-ysqrtmx-2m1sqrt2xm-2-xac-dinh-khi-x-geq-1.html#respond Mon, 09 Mar 2020 18:50:47 +0000 https://booktoan.com/de-dinh-m-de-ham-so-ysqrtmx-2m1sqrt2xm-2-xac-dinh-khi-x-geq-1.html https://booktoan.com/de-dinh-m-de-ham-so-ysqrtmx-2m1sqrt2xm-2-xac-dinh-khi-x-geq-1.html/feed 0 Đề: Tìm tập xác định của các hàm số:a) $y=\sqrt{3x+5}-\sqrt{3-2x}$ b) $y=\sqrt{3+5x}+\frac{2+x}{\sqrt{2x-3}}$ https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-ysqrt3x5-sqrt3-2x.html https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-ysqrt3x5-sqrt3-2x.html#respond Mon, 09 Mar 2020 08:47:54 +0000 https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-ysqrt3x5-sqrt3-2x.html https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-ysqrt3x5-sqrt3-2x.html/feed 0 Đề: Với những giá trị nào của $x$ thì các biểu thức sau có nghĩaa) $\sqrt[6]{2x-4}+\sqrt[8]{2-x} $ b) $\sqrt[4]{2x^2-x-1} $c) $\sqrt[5]{\frac{2x+1}{6-3x} }. $ https://booktoan.com/de-voi-nhung-gia-tri-nao-cua-x-thi-cac-bieu-thuc-sau-co-nghiaa-sqrt62x-4sqrt82-x.html https://booktoan.com/de-voi-nhung-gia-tri-nao-cua-x-thi-cac-bieu-thuc-sau-co-nghiaa-sqrt62x-4sqrt82-x.html#respond Sun, 08 Mar 2020 14:17:28 +0000 https://booktoan.com/de-voi-nhung-gia-tri-nao-cua-x-thi-cac-bieu-thuc-sau-co-nghiaa-sqrt62x-4sqrt82-x.html https://booktoan.com/de-voi-nhung-gia-tri-nao-cua-x-thi-cac-bieu-thuc-sau-co-nghiaa-sqrt62x-4sqrt82-x.html/feed 0 Đề: Tìm tập xác định của các hàm số:a) $y=(x^2-9)^{-4}$b) $y=x^\pi+(x^2+x-2)^e$ https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-yx2-9-4b-yxpix2x-2e.html https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-yx2-9-4b-yxpix2x-2e.html#respond Sat, 07 Mar 2020 07:43:31 +0000 https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-yx2-9-4b-yxpix2x-2e.html 0\\ x^2+x-2>0 \end{array} \right. \Leftrightarrow \left\{ […]]]> https://booktoan.com/de-tim-tap-xac-dinh-cua-cac-ham-soa-yx2-9-4b-yxpix2x-2e.html/feed 0