Question

(2^-1+4^-1+6^-1+8^-1)^x=1

Answer 1

(2^-1 + 4^-1 + 6^-1 + 8^-1)^x=1
(1/2+1/4+1/6+1/8)^x=1
(1/384)^x=1
384^-x=384^0
Since bases are same..powers will also be equal
-x=0
x=0