64, 48, 36, -27, ... Which formula can be used to describe the sequence? O f(x + 1) = AX) O f(x + 1) = 1x) O f(x) = f(x + 1) O F(X) = -Ax + 1)​

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.