(x+1)/6=6/(x+1)
Suy ra: (x+1)^2=6.6
Suy ra x+1=6 và x+1=-6
Nếu x+1=6 suy ra x=5
Nếu x+1=-6 suy ra x=-7
\(\frac{x+1}{6}=\frac{6}{x+1}\)
\(\Rightarrow x+1.x+1=6.6=36\)
\(\Rightarrow x.\left(1+1\right)=36\)
\(\Rightarrow x.2=36\)
\(\Rightarrow x=36\div2\)
\(\Rightarrow x=18\)
\(\frac{x+1}{6}\)= \(\frac{6}{x+1}\)
\(\Rightarrow\)x + 1.x + 1 = 6.6= 36
\(\Rightarrow\)x.(1+1) = 36
\(\Rightarrow\)x . 2 = 36
\(\Rightarrow\) x = 36:2
x = 18
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\(\frac{x+1}{6}=\frac{6}{x+1}\)
\(\Rightarrow x.1+1.x=6.6=36\)
\(\Rightarrow x.\left(1+1\right)=36\)
\(x.2=36\)
\(x=36:2\)
\(x=18\)
\(\frac{x+1}{6}=\frac{6}{x+1}\)
\(\text{ ⇒x+1.x+1=6.6=36}\)
\(\text{ ⇒x.(1+1)=36}\)
\(\text{ ⇒x.2=36}\)
\(\text{ ⇒x=36÷2 ⇒x=18 }\)
\(\frac{x+1}{6}=\frac{6}{x+1}\)
\(\Rightarrow\left(x+1\right)\left(x+1\right)=6.6\)
\(\Rightarrow x^2+2x+1=36\)
\(\Rightarrow x^2+2x-35=0\)
\(\Rightarrow x^2+7x-5x-35=0\)
\(\Rightarrow x\left(x+7\right)-5\left(x+7\right)=0\)
\(\Rightarrow\left(x-5\right)\left(x+7\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-5=0\\x+7=0\end{cases}\Rightarrow\orbr{\begin{cases}x=5\\x=-7\end{cases}}}\)
