Question

tìm x thuộc n biết 5 mũ 2x+1^ =125

Answer 1

\(5^{2x+1}=125\)

\(\Rightarrow5^{2x+1}=5^3\)

\(\Rightarrow2x+1=5\)

\(\Rightarrow2x=4\)

\(\Rightarrow x=2\)

Answer 2

\(5^{2x+1}=125\)

\(\Rightarrow5^{2x+1}=5^3\)

\(\Rightarrow2x+1=5\)

\(\Rightarrow2x=5-1\)

\(\Rightarrow2x=4\)

\(\Rightarrow x=4:2\)

\(\Rightarrow x=2\)

Answer 3

x = 2

Answer 4

x = 2

Answer 5

\(5^{2x+1}=125\\ 5^{2x+1}=5^3\\ 2x+1=3\\ 2x=2\\ x=1\)