Which function forms an arithmetic sequence when x = 1, 2, 3, ...? f (x) = negative StartFraction x Over 3 EndFraction + 5
f (x) = negative 2 Superscript x
f (x) = negative 2 x squared
f (x) = negative StartFraction 3 Over x EndFraction + 5

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.