\nthroot3{4}^{x}=4

\nthroot5{8}^{x}=0.25

\nthroot4{4}^{x}=256

\nthroot5{2}^{x}=256

\nthroot5{16}^{x}=0.125

\nthroot5{0.25}^{x}=0.5

\nthroot3{8}^{x}=512

\nthroot5{1024}^{x}=0.125

\nthroot5{0.5}^{x}=512

\nthroot4{8}^{x}=128

\nthroot4{2}^{x}=0.25

\nthroot3{0.25}^{x}=128

\nthroot5{0.25}^{x}=32

\nthroot3{8}^{x}=8

\nthroot5{2}^{x}=512

\nthroot5{2}^{x}=0.125

\nthroot5{32}^{x}=0.5

\nthroot5{32}^{x}=512

\nthroot5{2}^{x}=256

\nthroot4{0.25}^{x}=2

\nthroot5{4}^{x}=0.5

\nthroot4{16}^{x}=1024

\nthroot4{1024}^{x}=512

\nthroot3{8}^{x}=64