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We report the $^{75}$As-NQR and NMR studies on the iron arsenidesuperconductor Li$_{x}$FeAs with $T_{\rm c} \sim 17$ K. The spin latticerelaxation rate, $1/T_{1}$, decreases below $T_{\rm c}$ without a coherencepeak, and can be fitted by gaps with s$^{\pm}$-wave symmetry in the presence ofimpurity scattering. In the normal state, both $1/T_{1}T$ and the Knight shiftdecrease with decreasing temperature but become constant below $T \leq 50 K$.Estimate of the Korringa ratio shows that the spin correlations are weaker thanthat in other families of iron arsenides, which may account for the lower$T_{\rm c}$ in this material.

$^{75}$As NQR and NMR studies of superconductivity and electron correlations in iron arsenide Li$_{x}$FeAs