Question

Help me please... :"(
the question is attached below

Answer 1

\[7^{x+1} + 7^{x} +7^{x-1} = 399 \]
the basic logic stays to bring all denominator to

Answer 2

\[7^{x} \]

Answer 3

format

Answer 4

now take 7 pow (x) common from all

Answer 5

\[7^{x} \times7 + 7^{x}+ 7^{x}\times7^{-1}=399\]

Answer 6

take 7^{x} common from all

Answer 7

log2 ( log4 { log3 [ log2 x ] } ) = -1

look at the log bases... first put both sides to the power of 2, then to the power of 4, then 3, then finally 2 again. \[\Huge x = 2^{3^{4^{2^{-1}}}}\]

Answer 8

thank you!