Let A = {n E Z n = 5r for some integer r} and = {m e Z | m = 20s for some integer s}. Prove or disprove each of the following statements. а. АС В b. В С А

3. Let f = ax? + bx + c, for a, b, c real numbers and a + 0. Prove that f is a prime in R[x] if and only if b? 4ас3D D 2 0 then 4ac < 0. Prove that if b2 - -b + VD -b * - 2a 2a

| 3сos @ de is O a. -3 O b.0 О с.1 O d. 3

The graph ofg (x) x2 is given. 7. V The function u (x) was obtained g (x) and is graphed below. What is u (x)? и (х) 3 (х + 5)2 а.

Let c, a, B be nonzero real numbers such that c + B. Find a given that 162n–3 ac? Σ 20 cn-4 с — В n=3 2n-3 Türkçe: c, a, B sıfırdan farklı reel sayılar ve c+ B olsun. Eğer 20 cn-4 ac? n=3 ise a 'yı bulunuz. 82176 O 77824 O 81904 O 81664 O 81936 O 81920