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To solve a galerkin method of approach equation must be in ___________

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To solve a galerkin method of approach equation must be in  ___________

(a) Equation

(b) Vector equation

(c) Matrix equation

(d) Differential equation

I got this question in an interview for internship.

I want to ask this question from One Dimensional Problems topic in section One Dimensional Problems of Finite Element Method

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Correct choice is (d) Differential equation

To elaborate: Galerkin method of approach is also called as weighted residual technique. This method of approach can be used for irregular geometry with a regular pattern of nodes. The solution function is substituted in a differential equation, this differential equation will not be satisfied and will give a residue.

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