Approximation by linear combination of generalization of Phillips Baskakov operators of summation-integral form

الملخص EN

The aim of the present paper is to study the phenomena of simultaneous approximation ( approximation of derivatives of functions by the corresponding order derivatives of operators) by the linear combination .

We establish a Voronovskaja-type asymptotic formula and obtain an error estimate in terms of the modulus of continuity for these operators.