(I SPENT SO MUCH HOURS GRINDING ON THIS ;-;)

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x