jika 4 log x/1-2×4 log x, nilai f(2a)+f(2/a)?

(⁴log 2a / 1-2.⁴log 2a) + (⁴log2/a / 1-2.⁴log2/a)
=(⁴log2a / ⁴log4 - ⁴log (2a)²) + (⁴log2/a / ⁴log 4 - ⁴log (2/a)²)
=(⁴log 2a/ ⁴log 4/4a²) + (⁴log 2/a / ⁴log 4/(4/a²))
=^a^-2 log 2a + ^a² log 2/a
=^a² log (2a)^-1 + ^a² log 2/a
=^a² log 1/2a. 2/a
=^a² log 1/a²
=^a² log (a²)^-1
=-1.^a² log a²
=-1.1=-1