Question

Equação exponencial: 7*x + 7*x-1 = 8

Answer 1

7˟ + 7˟ ⁻ ¹ = 8

7˟ + 7˟ .7⁻¹ = 8

7˟ .( 1 + 7⁻¹ ) = 8

7˟ .[ 1 + ( 1/7 ) ] = 8

7˟ .[ ( 7 + 1 )/7 ] = 8

7˟ .( 8/7 ) = 8

7˟ . 8 = 8 .7

7˟ = 7¹

x = 1

R ▬▬▬▬► S = { 1 }