—That's true. _______ him, people built Sun Yat-sen Memorial Hall.
A:With the help of
B:In memory of
C:Instead of
(Ⅰ)求f(t)的单调减区间;
(Ⅱ)求证:f(t)+f(t+2)+f(t+4)是定值.
若 4x2-mx+9 是完全平方式,则m的值是____.
读图甲和图乙,完成下列问题。