How to solve this matrix equation by finite element method? (related to college mathematics) - Training Enrollment Network

How to solve this matrix equation by finite element method? (related to college mathematics)

This matrix equation can be obtained by solving the inverse matrix, and the u value can be obtained. that is

E/30*Ku=F

u=30/E*inv(K)F？ The inverse matrix of% inv(k)-k can be calculated by elementary transformation.

The solution is as follows:

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