Răspuns :
5ˣ+5ˣ⁺¹=750
5ˣ ×(5⁰+5¹)=750
5ˣ ×(1+5)=750
5ˣ ×6=750
5ˣ =750:6
5ˣ =125
5ˣ =5³
x=3
5ˣ ×(5⁰+5¹)=750
5ˣ ×(1+5)=750
5ˣ ×6=750
5ˣ =750:6
5ˣ =125
5ˣ =5³
x=3