x + 4y2 = 0 , x + 5y2 = 1
Arc Length q123 : - ! -1 - ( )Foundations
Q157 InequalityQ208 ...Argand diagrams Q2 Geometry Q253 Inequality
Q101: \ ...26 . y=(1/2)e^(-x) -1 - -
: 1 (0 1 )
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