bn nên ghi rõ r. Bn vt thế này mk ko hiểu bn vt cái j cả
\(\frac{x-1}{15}=\frac{-60}{1-x}\)
\(x-1=\frac{900}{1-x}\)
\(\left(x-1\right)\left(1-x\right)=-900\)
\(x-x^2-1+x=-900\)
\(2x-x^2-1=-900\)
\(2x-x^2-1+900=0\)
\(2x-x^2-899=0\)
\(\left(x-31\right)\left(x+29\right)=0\)
\(\orbr{\begin{cases}x-31=0\\x+29=0\end{cases}}\)
\(\orbr{\begin{cases}x=31\\x=-29\end{cases}}\)
tim nghiem da thuc
3xx+x
xx-5x-6
2xx+10x-12
xxx-xx+x-1
cho $M=\frac{42-x}{x-15}$M=42−xx−15 tim so nguyen x de M dat gia tri nho nhat
tim x, biết x/-15=-60/x
*giúp mjnh bai nay cai nha*
1.tim x
a) /x+3/4\ - 1/3=0
b)(0-1/2mu3=1/27
c)x-1/-15=-60/x-1
2.tinh
a.[3/7.4/15+1/3.(9mu15]mu0.1/3.68/124
b. 10mu4.81-16.5mu2/4.675
tim x biet :
x/-15=-60/x
-2/x=-x/8
TIM X,BIET
-X/15=-60/X
tinh :
a,5.7.77-7.80+49.25-15.42/
b,A=100+98+96+...+2-97-95-...-1
/c,(20.24+12.2^4-48.2^2).8^2/
2,tim x:
a,[(250-25):15]:x=(450-60):130
/b,8+(x+1)+(x+2)+...+(x+49)=1425
tim x thuoc n va x>2 de
x(x-1) .x(x-1)=(x-2)xx(x-1)
x-1/ -15 = -60 / x - 1
