15. Find a and b so that function f(x)=ax3+bx2+1 will have a relative minimum value at a point insid
問題詳情
15. Find a and b so that function f(x)=ax3+bx2+1 will have a relative minimum value at a point inside the open interval (1, 3). (A) a =1, b =1 (B) a =1, b = −1 (C) a = −1, b =2 (D) a = 2, b = −4 (E) a = −1, b =3