Kết quả tìm kiếm

a) P=(\frac{1}{\sqrt{x}-1}+\frac{1}{\sqrt{x}+1}): \frac{\sqrt{x}}{\sqrt{x}-1} =\frac{\sqrt{x}+1+\sqrt{x}-1}{x-1}: \frac{\sqrt{x}}{\sqrt{x}-1} =\frac{2\sqrt{x}.(\sqrt{x}-1)}{\sqrt{x}(x-1)} =\frac{2}{\sqrt{x}+1} b) P= \frac{1}{3} \Leftrightarrow \frac{2}{\sqrt{x}+1}=\frac{1}{3} \Leftrightarrow...

1. If it wasn't in the snowy weather, we would go to school. 2. If you drink too much coffee, you will not sleep 3. Unless you had told me aboutSue's hair, I wouldn't have noticed

If it wasn't in the snowy weather, we would go to school. If you drink too much coffee, you will not sleep Unless you had told me aboutSue's hair, I wouldn't have noticed

6. ĐKXĐ: x\geq 2 \sqrt{2x-1}+\sqrt{x-2}=\sqrt{x+1} \Leftrightarrow 2x-1+x-2+2\sqrt{(2x-1)(x-2)}=x+1 \Leftrightarrow 2x-1+x-2-x-1=-2\sqrt{(2x-1)(x-2)} \Leftrightarrow 2x-4=-2\sqrt{2x^{2}-4x-x+2} \Leftrightarrow -2(2-x)=-2\sqrt{2x^{2}-5x+2} \Leftrightarrow 2-x=\sqrt{2x^{2}-5x+2}...

I think it is necessary for secondaly students to wear casual clothes when they are at school because of the following reasons. firstly, wearing casual clothes is very comfortable so students can act, play easily. Secondly, wearing casual clothes gives students freedom of choice about sizes...

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con anh thư tê!!!!!!!!!!!!!!!!!!!!