mẹ mày mấy tuổi mượt mẹ mày

\(a.P=\dfrac{a\sqrt{a}}{\sqrt{a}-1}+\dfrac{1}{1-\sqrt{a}}=\dfrac{a\sqrt{a}}{\sqrt{a}-1}-\dfrac{1}{\sqrt{a}-1}=\dfrac{\left(\sqrt{a}-1\right)\left(a+\sqrt{a}+1\right)}{\sqrt{a}-1}=a+\sqrt{a}+1\) \(b.a=\dfrac{9}{4}\left(TM\right)\) ⇒ \(\sqrt{a}=\dfrac{3}{2}\) , ta có :

\(P=\dfrac{9}{4}+\dfrac{3}{2}+1=\dfrac{19}{4}\)

\(\left(\dfrac{\sqrt{x}}{\sqrt{x}+2}-\dfrac{3}{2-\sqrt{x}}+\dfrac{3\sqrt{x}-2}{x-2}\right):\left(\dfrac{\sqrt{x}+3}{\sqrt{x}-2}+\dfrac{2\sqrt{x}}{2\sqrt{x}-x}\right)=\dfrac{x-2\sqrt{x}+3\sqrt{x}+6+3\sqrt{x}-2}{\left(\sqrt{x}+2\right)\left(\sqrt{x}-2\right)}:\dfrac{\sqrt{x}+1}{\sqrt{x}-2}=\dfrac{\left(\sqrt{x}+2\right)^2}{\left(\sqrt{x}+2\right)\left(\sqrt{x}-2\right)}.\dfrac{\sqrt{x}-2}{\sqrt{x}+1}=\dfrac{\sqrt{x}+2}{\sqrt{x}+1}\)

Lỗ 90.000 đồng

Nhầm 960 mới đúng

\(a.P=\dfrac{2\sqrt{x}-5}{x-5\sqrt{x}+4}+\dfrac{2}{\sqrt{x}-1}-\dfrac{1}{\sqrt{x}-4}=\dfrac{2\sqrt{x}-5+2\sqrt{x}-8-\sqrt{x}+1}{\left(\sqrt{x}-1\right)\left(\sqrt{x}-4\right)}=\dfrac{3}{\sqrt{x}-1}\) ( x ≥ 0 ; x # 1 ; x # 16 )

\(b.\) \(P\text{∈}Z\) ⇔ \(\dfrac{3}{\sqrt{x}-1}\text{∈}Z\) ⇔ \(\sqrt{x}-1\text{∈}\left\{1;-1;3;-3\right\}\)

+) \(\sqrt{x}-1=1\text{⇔}x=4\left(TM\right)\)

+) \(\sqrt{x}-1=-1\text{⇔}x=0\left(TM\right)\)

+) \(\sqrt{x}-1=3\text{⇔}x=16\left(KTM\right)\)

+) \(\sqrt{x}-1=-3\text{⇔}vo-nghiem\)

KL............

1 tui co so bup be la :

1520 : 4 = 380 ( bup be )

Dap so : 380 bup be

1+1=2 chứ mấy nữa hả

Số bé là: (2014-1):2-20=986,5

Số lớn là:(2014+1):2+20=1027,5 

chac chan 100% ban nhe !

34% của 100 là

100:100x34=34

Ủng hộ mk nha