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Q99Section C (Part C)99 of 120

Extremals versus minimizers for a quadratic functional with a free end

For a,b,c∈Ra,b,c\in\mathbb R, consider the variational problem:

Minimize J[y]=∫02[a (y′)2+2byy′+cy2] dxJ[y]=\displaystyle\int_0^2\big[a\,(y')^2+2byy'+cy^2\big]\,dx, subject to y(0)=10y(0)=10, y(1)=100y(1)=100.

Then which of the following statements are true?

Multiple select: one or more options are correct. Select all of them, then submit — marks need the exact set.

Options

Select every correct option, then submit.