Sunday, 15 August 2021

Let a,b,c,d>0, be any real numbers. Then the maximum possible value of cx+dy, over all points on the ellipse x2a2+y2b2=1 must be
at
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Define f:R→R by \[f(x)= \begin{cases}(1-\cos x) \sin \left(\frac{1}{x}\right), & x \neq 0 \ 0, ...