tim x,biet: 435 + 24 : x = 500 - 65 + 24 : 3
tìm y biết : 435 + 24 : y = 500 - 65 + 24 :3
435+24:y=443
24:y=443-435
24:y=8
y=24:8
y=3
giúp mình nhé! sợ sai thì thử lại nhé!
435 + 24 : y = 500 - 65 + 24 : 3
435 + 24 : y = 443
24 : y = 443 - 435
24 : y = 8
y = 24 : 8
y = 3
tim x biet:
3^( x + 2 ) - 3^x = 24!
\(3^{x+2}-3^x=24\)
\(3^x.3^2-3^x.1=24\)
\(3^x.\left(3^2-1\right)=24\)
\(3^x.\left(9-1\right)=24\)
\(3^x.8=24\)
\(3^x=24:8\)
\(3^x=3\)
\(3^x=3^1\)
\(\Rightarrow x=1\)
tim x biet: x + x/3=24
x+x/3 =24
x/1+x/3=24
3x+x/3=24
4x/3=24
4x=24.3
4x=72
x=72/4
x=18
\(+\frac{x}{3}=24\)
\(=>x+x.\frac{1}{3}\)\(=24\)
\(=>x.1+x.\frac{1}{3}=24\)
\(=>x.\left(1+\frac{1}{3}\right)=24\)
\(=>x.\frac{4}{3}\)\(=24\)
\(=>x=24:\frac{4}{3}\)
\(=>x=24.\frac{4}{3}\)
\(=>x=18\)
Tim so nguyen x biet : x+(x+1)+(x+2)+(x+3)+........+23+24=0
Tao không biết và tao cũng chẳng quan tâm
tim x,y thuoc Z biet -3/6=x/-2=-18/y=3/24
ta có : \(\dfrac{-3}{6}=\dfrac{x}{-2}=\dfrac{-18}{y}=\dfrac{3}{24}\)
\(\Rightarrow\dfrac{-3}{6}=\dfrac{3}{24}\) (vô lí)
\(\Rightarrow\) đề sai
Tim so nguyen x, biet :
a/ -24 + (x + 4)^4 = 10^3
b/ 2.(x + 7) - 3.(6 - x) = -24
c/ 3x - 6x^2 = 0
a/
\(-24+\left(x+4\right)^4=10^3\)3
\(\Leftrightarrow-24+x^4+16x^3+96x^2+256x+256=10^3\)
<=>\(x^4+16x^3+96x^2+256x-768=0\)
Giải trên tập số phức ta được
\(x=-\sqrt{32}-4\)
\(x=\sqrt{32}-4\)
\(x=-\sqrt{32}i-4\)
\(x=\sqrt{32}1-4\)=> Phần a kog có giá trị nguyên nào của x thỏa mãn phương trình
b/
2(x+7)-3(6-x)=-24
<=> 2x+14-18+3x=-24
<=>5x=-20
<=>x=-4
Vậy x=-4
c/
\(3x-6x^2=0\)
\(\Leftrightarrow3x\left(1-2x\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}3x=0\\1-2x=0\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=\frac{1}{2}\end{cases}}\)(x = 1/2 kog thỏa mãn yêu cầu)
Vậy x=0
a/\(\left(x+4\right)^4=1000+24\)
\(\Rightarrow x^4+8x^2+4^4-1024=0\)
\(\Rightarrow x^4+8x^2-768\)
\(\Rightarrow x^4-24x+32x-768=0\)
\(\Rightarrow x.\left(x-24\right)+32.\left(x-24\right)\)
\(\Rightarrow\left(x+32\right).\left(x-24\right)\Rightarrow\orbr{\begin{cases}x=-32\\x=24\end{cases}}\)
b/2x+14-18+3x=-24
5x=-24-14+18
x=-20/5=-4
c/3x-6x\(^2\) =0
\(3x.\left(1-2x\right)=0\)
\(\Rightarrow\orbr{\begin{cases}3x=0\rightarrow x=0\\1-2x=0\rightarrow x=\frac{1}{2}\end{cases}}\)
KL bAN tu lam nhe
ban HA sai hang đang thưc rôi \(\left[\left(x+4\right)^2\right]^2\) khai triên ra nhu binh thuong
tim x biet 1- (5/3/8 + x - 7/5/24 ) / 16/2/3 =0
giup minh voi :
tim x, biet : x+x/3=24
\(x+\frac{x}{3}=24\)
\(\frac{3x}{3}+\frac{x}{3}=24\)
\(\frac{4x}{3}=24\)
4x=24x3
4x=72
x=72:4
x=18
x+\(\frac{x}{3}\)=24
\(\frac{3x}{3}\)+\(\frac{x}{3}\)=24
\(\frac{3x+x}{3}\)=24
\(\frac{4x}{3}\)=24
4x=24x3
x=18
tim x biet:38*x+24*x=4221
\(38.x+24.x=4221\)
\(\left(38+24\right).x=4221\)
\(62.x=4221\)
\(x=4221:62\)
\(x=\frac{4221}{62}\)
tự rút gọn nha.
kb vs tớ nha
Mình cho x là a nhé!
38xa+24xa=4221
(38+24)xa=4221
62xa=4221
a=4221:62
a=4221/62
Chúc bạn may mắn!