Đáp án mới nhất

1

$\sqrt{2+\sqrt{3}}$ +$\sqrt{2-\sqrt{3}}$
2

$\sqrt{2+\sqrt{3}}$ +$\sqrt{2-\sqrt{3}}$
3

Nếu $ ax^{3} = by^{3} = cz^{3} và \frac{1}{x} + \frac{1}{y} + \frac{1}{z} = 1$Chứng minh rằng : $ \sqrt[3]{ax^{2}+ by^{2} + cz^{2}} = \sqrt[3]{a} + \sqrt[3]{b} + \sqrt[3]{c}$1x+1y+1z=
6

Tính giá trị nguyên của x thỏa mãn :2 x 2^2 x 2^3 ... x 2^x = 32768
3

cho x, y thuộc Z CMR: 6x + 11y chia hết cho 31 $\Leftrightarrow$ x + 7y chia hết cho 31
7

cho x, y thuộc Z CMR: 6x + 11y chia hết cho 31 $\Leftrightarrow$ x + 7y chia hết cho 31
10

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
10

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
10

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
10

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
9

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
9

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
10

a) $\left (\sqrt{x}- \frac{x}{x+\sqrt{x}} \right )$ : $\frac{\sqrt{x}-1}{x\sqrt{x}-\sqrt{x}}$b)$\left ( \frac{1}{\sqrt{a}-1} -\frac{1}{\sqrt{a}}\right )$ : $\left ( \frac{\sqrt{a}+1}{\sqrt{a}-2}-\frac{\sqrt{a}+2}{\sqrt{a}-1} \right )$c)$\left (...
10

Rút gọn đa thứca) $2$ $\sqrt{a}^{2}$ $-$ $5$$a$ với a <0b ) $\sqrt{25a}^{2}$ + 3a với a $\geq$ 0c ) $\sqrt{9a}^{4}$ + $3a^{2}$ d) $5$$\sqrt{4a^{6}}$ - $3a^{3}$ với a<0
10

Rút gọn đa thứca) $2$ $\sqrt{a}^{2}$ $-$ $5$$a$ với a <0b ) $\sqrt{25a}^{2}$ + 3a với a $\geq$ 0c ) $\sqrt{9a}^{4}$ + $3a^{2}$ d) $5$$\sqrt{4a^{6}}$ - $3a^{3}$ với a<0
10

Chứng minh($\sqrt{3 }-1)^{2}$ $=$ $4$- $2$$\sqrt{3}$$\sqrt{4-2\sqrt{3}}-\sqrt{3}=-1$
10

Chứng minh($\sqrt{3 }-1)^{2}$ $=$ $4$- $2$$\sqrt{3}$$\sqrt{4-2\sqrt{3}}-\sqrt{3}=-1$
9

Chứng minh($\sqrt{3 }-1)^{2}$ $=$ $4$- $2$$\sqrt{3}$$\sqrt{4-2\sqrt{3}}-\sqrt{3}=-1$
9

viết các biểu thức sau dưới dạng hằng đẳng thức$9$ + $4$$\sqrt{5}$$7$- $4$$\sqrt{3}$x+4 $\sqrt{x-4}$x+2 $\sqrt{x -1}$
0

giải phương trình x^2 + 8x^3/căn(9-x^2) = 9
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