F (x) = 1+log4^x the 4 is low to the log

Well, if you subtract one you get - 1=log4^x. base four on each side: 4 (to the power of negative 1) = 4 (to the power of log base four) x. Four to the power of log base 4 cancels, and you're left with 4 to the power of - 1=x. the negative exponent recipricates, so x=1/4. you're welcome.