Question

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Answer 1

( √7 )²ˣ ⁺ ⁸  =  1

( √7 ) ²ˣ ⁺ ⁸ = ( √7 )⁰

2x + 8 = 0

2x = - 8

x = - 8/2   →  x =  -  4


15ˣ ⁻ ⁴ˣ = 1

15ˣ ⁻ ⁴ˣ = 15⁰

x - 4x = 0

x (1 - 4 ) = 0  →  x  =  0


( 1/4 )ˣ  =  1/64

( 1/4 ) ˣ  =  ( 1/4 )³

x = 3


( 1/3 )ˣ ⁺ ¹ =  1/243

( 1/3 ) ˣ ⁺ ¹ =  ( 1/3 )⁵

x + 1 = 5

x = 5 - 1

x = 4.