Fejér-Hermite-Hadamard inequalities for $n$-times differentiable preinvex functions

Abstract

In this paper, some new estimates of Hermite-Hadamard-Fejér inequality for $n$-times differentiable preinvex functions are established. It is noteworthy that the weighted estimates of the left and right hand side of the Hermite-Hadamard inequalities involving generalized preinvex functions doesn't exist previously.