This is a practice question from the lecture note, and I have no…This is a practice question from the lecture note, and I have no idea to solve it.Consider the following closely related sets:??D1?={y?C[a,b]|y(a)=y(b)=0}?? ??D2?={y?C[a,b]|y(a)=0,y(b)=2}?? ??D3?={y?C2[a,b]|y(a)=y(b)=0,y'(a)=y'(b)=0}?? Checking the definition of a linear space shows that D1 and D3 are linear spaces. The set D2 is not a linear space.MathAlgebra

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