Giai pt
x-5/x-5 + x-6/x-5 +...+1/x-5=4
giai pt
x-5√x+6=0
\(ĐK:x\ge0\\ PT\Leftrightarrow\left(\sqrt{x}-2\right)\left(\sqrt{x}-3\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}\sqrt{x}=2\\\sqrt{x}=3\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=4\\x=9\end{matrix}\right.\)
giúp mình giai mấy bài này với
2^2*x-1:4=8^3
(x-5)^4=(x-5)^6
5^x:5^2=125
1) 4*x-0.25=512
4*x = 512+0,25
4*x= 512,25
x=512.25:4=128,0625
nhìu quá ko làm nữa
giai giup nhe
(5.x+2)+(5.x+4)+(5.x+6)+...+(5.x+200)=90100
\(\left(5x+2\right)+\left(5x+4\right)+\left(5x+6\right)+...+\left(5x+200\right)=90100.\)
\(\Leftrightarrow5x+2+5x+4+5x+6+...+5x+200=90100\)
\(\Leftrightarrow\left(5x+5x+...+5x\right)+\left(2+4+6+...+200\right)=90100\)
\(\text{Số các số hạng là: }\frac{\left(200-2\right)}{2}+1=100\left(\text{số}\right)\text{ *Chú ý chỗ nãy nếu lớp 7-8 rồi thì ko cần }\)
\(\Leftrightarrow5x.100+\frac{\left(200+2\right).100}{2}=90100\)
\(\Leftrightarrow500x+10100=90100\)
\(\Leftrightarrow x=\frac{90100-10100}{500}\)
\(\text{Vậy }x=160\)
giai cac phuong trinh sau
a;(6-x)^4+(8-x)^4=16 b;(x+1)^4+(x-3)^4=82 c;(4-x)^5+(x-2)^5=32
tinh gia tri bieu thuc sau :(x-4)^(x-5)^(x-6)^(x+5)^(x+6)
giup mik giai bai nay voi
giai cac phuong trinh sau
a) x + 5 can x - 6 =0
b) x - can x + 1/4 = 0
a: \(x+5\sqrt{x}-6=0\)
\(\Leftrightarrow\sqrt{x}-1=0\)
hay x=1
b: \(x-\sqrt{x}+\dfrac{1}{4}=0\)
\(\Leftrightarrow\sqrt{x}-\dfrac{1}{2}=0\)
hay \(x=\dfrac{1}{4}\)
giai cac phuong trinh sau
a) x + 5 can x - 6 =0
b) x - can x + 1/4 = 0
a: \(x+5\sqrt{x}-6=0\)
\(\Leftrightarrow\sqrt{x}-1=0\)
hay x=1
b: \(x-\sqrt{x}+\dfrac{1}{4}=0\)
\(\Leftrightarrow\sqrt{x}-\dfrac{1}{2}=0\)
hay \(x=\dfrac{1}{4}\)
giai cac phuong trinh sau
a) x + 5 can x - 6 =0
b) x - can x + 1/4 = 0
a: \(x+5\sqrt{x}-6=0\)
\(\Leftrightarrow\sqrt{x}-1=0\)
hay x=1
b: \(x-\sqrt{x}+\dfrac{1}{4}=0\)
\(\Leftrightarrow\sqrt{x}-\dfrac{1}{2}=0\)
hay \(x=\dfrac{1}{4}\)
Giai phương trình
1. 5-(6-x)=4(3-2x)
2. (x+1)(x+9)=(x+3)(x+5)
3.\(\frac{3\left(5x-2\right)}{4}\) -2=\(\frac{7x}{3}\)-5(x-7)
4. 3(x+1)(2x+5)=3(x+1)(7x-4)
5. (x-2)2-(3x+1)2+x(4x-1)=0