Question: Consider the follwing displacement function for 2 - node and 3 - node truss element u = a + b x 2 u = a

Consider the follwing displacement function for 2-node and 3-node truss element
u=a+bx2
u=a1+a2x+a7x2
u=a1cosx+a2sinx
is this a valid displacement function? Disscuss why or why not.
Consider the follwing displacement function for 2

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