In this study, we have studied the multi-order differential equations. The model we have followed agrees with initial value problem which, in its turn, has a group of linear ordinary differential equations. This paper's aim is programming a Variational Iteration Method (VIM) using Wolfram's Mathematica. Variational Iteration Method offers a study that introduce approximated solutions of the multi-order ordinary differential equations. Several examples of different order have been resolved.
The purpose from the research to choose the correct and best type of cement that is prevail able by mass quantity in the markets and different types. To construction the infrastructures needs the best types but the worthy mentioned the world specifications depend on compressive strength after (28) days that means the target to recognize the cements, to exploit the times can be used the chemical analysis for cement composition and calculate the compressive strength on the alkali and alit during hours instead of (28) days practically. The advanced devices used to analysis the cement composition is (X-ray) device.
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