Ta có: \(\frac{x-2}{33}=\frac{-132}{2-x}\)
Áp dụng tính chất : tích trung tỷ bằng tích ngoại tỷ
=> (x - 2).(2 - x) = 33.(-132)
=> (2x - 4) - (x2 - 2x) = -4356
=> 4 - x2 = - 4356
=> x2 = 4 + 4356
=> x2 = ?////
Chọn câu đúng:
A. \(\frac{31}{2}\)x \(\frac{32}{2}\)x\(\frac{33}{2}\)x.....x \(\frac{60}{2}\)= 1x2x3x...x60
B.\(\frac{31}{2}\)x \(\frac{32}{2}\)x\(\frac{33}{2}\)x....x \(\frac{60}{2}\)=1x3x5x7...x59
C.\(\frac{31}{2}\)x\(\frac{32}{2}\)x\(\frac{33}{2}\)x....x \(\frac{60}{2}\)=1x3x5x7...x60
D. \(\frac{31}{2}\)x\(\frac{32}{2}\)x\(\frac{33}{2}\)x....x \(\frac{60}{2}\)= 2x4x6x...x60
giúp mik vs mik đag cần gấp ngay bây h
\(\frac{1}{2}x+\frac{3}{5}x=\frac{-33}{25}\)
Tìm x, biết:
a) \(\left(\frac{4}{5}\right)^{2x+7}=\frac{625}{256}\)
b) \(\frac{7^{x+2}+7^{x+1}+7^x}{57}=\frac{5^x+5^{2x+1}+5^{2x+2}}{132}\)
1) Tim x:
\(\frac{1}{2}\cdot x+\frac{3}{5}\cdot x=\frac{-33}{10}\)
/tmf x biết
/x-2/+2=x
\(x^2+5x+4=0\)
\(8\sqrt{x}=x^2\)
\(\frac{x+29}{31}-\frac{x+27}{33}=\frac{x+17}{43}-\frac{x+15}{45}\)
/x-1/+3x=1
Tìm x
/x-2/+2=x
\(x^2+5x+4=0\)
\(8\sqrt{x}=x^2\)
\(\frac{x+29}{31}-\frac{X+27}{33}=\frac{X+17}{43}-\frac{X+15}{45}\)
/X-1/\(+3X=1\)
Tìm x,y,z biết
1. \(\frac{x}{3}=\frac{z}{4};\frac{y}{2}=\frac{z}{3}vàx-y-z=33\)
2 . \(\frac{x}{2}=\frac{y}{3};\frac{y}{4}=\frac{z}{5}và2x+3y+5z=127\)
Tìm x,y,z biết
1. \(\frac{x}{3}=\frac{z}{4};\frac{y}{2}=\frac{z}{3}vàx-y-z=33\)
2 . \(\frac{x}{2}=\frac{y}{3};\frac{y}{4}=\frac{z}{5}và2x+3y+5z=127\)
1.tính giá trị của biểu thức sau(tính bằng cahs hợp lý nếu có thể )
\(A=\frac{2}{7}+\frac{3}{7}:\left(-\frac{3}{2}\right)\)
\(B=-\frac{5}{17}.\frac{31}{33}+-\frac{5}{17}\cdot\frac{2}{33}+2\frac{5}{17}\)
2. TÌM X BIẾT
A)\(\frac{3}{5}x+\frac{2}{3}=2\frac{2}{3}\)
b)\(5-\backslash3x-1\backslash=3\)
c)0,3x:3\(\frac{1}{3}=6:15\)
d)9\((x-1)^2-\frac{4}{9}:\frac{2}{9}=\frac{1}{4}\)
