関連ワード:  is x an even or odd function    is e x an even or odd function    is sin x an even or odd function    is x 2 an even or odd function    is cos x an even or odd function    is 1 x an even or odd function    is x 3 an even or odd function    is tan x an even or odd function    is y x an even or odd function    f )= x is odd or even function