Răspuns :
Răspuns:
7ˣ+7ˣ⁺¹=2³·7²⁰¹⁶
7ˣ+7ˣ⁺¹=8·7²⁰¹⁶
7ˣ+7ˣ⁺¹=(7+1)·7²⁰¹⁶
7ˣ+7ˣ⁺¹=7·7²⁰¹⁶+1·7²⁰¹⁶
7ˣ+7ˣ⁺¹=7²⁰¹⁷+7²⁰¹⁶
x+x+1=2017+2016
2x=4033-1
x=4032:2
x=2016
Răspuns:
7ˣ+7ˣ⁺¹=2³·7²⁰¹⁶
7ˣ+7ˣ⁺¹=8·7²⁰¹⁶
7ˣ+7ˣ⁺¹=(7+1)·7²⁰¹⁶
7ˣ+7ˣ⁺¹=7·7²⁰¹⁶+1·7²⁰¹⁶
7ˣ+7ˣ⁺¹=7²⁰¹⁷+7²⁰¹⁶
x+x+1=2017+2016
2x=4033-1
x=4032:2
x=2016