4) 2x+1 = 64 = 26
=> x + 1 = 6
x = 5
5) 4x+1 + 40 = 65
4x+1 + 1 = 65
4x+1 = 64 = 43
=> x + 1 =3
x=2
\(2^{x+1}=2^6\)
\(x+1=6=>x=5\)
\(4^{x+1}+4^0=65\)
\(=>4^{x+1}+1=65=>4^{x+1}=64=4^3\)
\(x+1=3=>x=2\)
2x+1 = 64
2x+1 = 26
=> x + 1 = 6
x = 5
4x+1 + 40 = 65
4x+1 + 1 = 65
4x+1 = 64
4x+1 = 43
=> x + 1 = 3
x = 2
4)2x+1=64
=>2x. 2=64
=>2x =64-2
2x =32
2x =25
=>x=5
k nha
câu 5 tương tự!!!!
4)2x+1=64 5)4x+1+40=65
2x+1=26 4x+1+1 =65
x+1 =6 4x+1 =65-1
x =6-1 4x+1 =64
x =5 4x+1 =43
x+1 =3
x =3-1
x =2
5, \(4^{x+1}+4^0=65\)
\(\Rightarrow\) \(4^{x+1}+1=65\)
\(\Rightarrow\) \(4^{x+1}=64\)
\(\Rightarrow\) \(4^{x+1}=4^3\)
\(\Rightarrow\) \(x+1=3\)
\(\Rightarrow\) \(x=2\)