[微積] 函數的連續性
有兩個題目想請教大家
R=real numbers
Q=rational numbers
1. h(x):[a,b]->R, continuous function
If h(x)屬於Q, for all x in [a,b]
Then h(x)
A) constant on [a,b]
B) increasing on [a,b]
C) decreasing on [a,b]
D) differantiable on (a,b)
E) 存在c in [a,b] s,t, f(c)=0
F) 存在c in [a,b] s,t, f(c)>f(a)
這題需要用到Q dense in R 這個性質嗎?
2.f(x)= lim [cos(x)]^2n ,n趨近無窮大
x is real numbers.
怎麼找f的連續點和不連續點呢?
謝謝~~
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