[微分] 2題求救...
1.
Show that
the hyperbola x^2-y^2=5
and
the ellipse 4x^2+9y^2=72
are orthogonal.
2.
Show that the sum of the x- and y-intercepts of
any line tangent to the graph of
(1/2) (1/2) (1/2)
x + y = c
is constant and equal to c.
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※ 編輯: victor7935 來自: 140.123.221.147 (10/31 02:32)
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