let f(x)=ax^2-c,if-4≤f(1)≤-1 and -1≤f(2)≤5,then f(3)的取值范围?A -7≤f(3)≤28B 0≤f(3)≤3C -1≤f(3)≤7D -1≤f(3)≤20我希望有解答过程thank you
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 13:19:21
letf(x)=ax^2-c,if-4≤f(1)≤-1and-1≤f(2)≤5,thenf(3)的取值范围?A-7≤f(3)≤28B0≤f(3)≤3C-1≤f(3)≤7D-1≤f(3)≤20我希望有解
let f(x)=ax^2-c,if-4≤f(1)≤-1 and -1≤f(2)≤5,then f(3)的取值范围?A -7≤f(3)≤28B 0≤f(3)≤3C -1≤f(3)≤7D -1≤f(3)≤20我希望有解答过程thank you
let f(x)=ax^2-c,if-4≤f(1)≤-1 and -1≤f(2)≤5,then f(3)的取值范围?
A -7≤f(3)≤28
B 0≤f(3)≤3
C -1≤f(3)≤7
D -1≤f(3)≤20
我希望有解答过程
thank you
let f(x)=ax^2-c,if-4≤f(1)≤-1 and -1≤f(2)≤5,then f(3)的取值范围?A -7≤f(3)≤28B 0≤f(3)≤3C -1≤f(3)≤7D -1≤f(3)≤20我希望有解答过程thank you
f(1)=a-c,f(2)=4a-c,f(3)=9a-c
令9a-c=m(a-c)+n(4a-c)
解得m=-5/3,n=8/3
因为-4≤a-c≤-1,-1≤4a-c≤5
所以5/3≤m(a-c)≤20/3,-8/3≤n(4a-c)≤40/3
所以5/3-8/3≤9a-c≤20/3+40/3
即-1≤9a-c≤20
所以-1≤f(3)≤20
let f(x)=ax^2-c,if-4≤f(1)≤-1 and -1≤f(2)≤5,then f(3)的取值范围?A -7≤f(3)≤28B 0≤f(3)≤3C -1≤f(3)≤7D -1≤f(3)≤20我希望有解答过程thank you
f(x)=ax^2+bx+c,f(x)
二次函数f(x)=ax^2-c满足:-4
若f(x)=ax^2-c满足-4
已知f(x)=ax^2+c,且-4
f(x)=ax²-ax-4
已知f(x)=ax^2+2bx+c(a
f(x)=ax^2+bx+c,x1
二次函数f(x)=ax^2+bx+c(a
二次函数f(x)=ax^2+bx+c(a
设函数f(x)=ax^2+bx+c (a
f(x)=ax^2+bx+c(a
设函数f(x)=ax^2+bx+c((a≠0),满足f(x+1)=f(-x-3),且f(-2)>f(2),解不等式f(-2x^2+2x-3)>f(x^2+4x+3)
若函数f(x)=ax^4+bx^2+c满足f'(1)=2,则f'(-1)=?
1.given the function f(x) = x*2 -4x -5,find the values of:a) f(k-2) b) f(x*2) - x*2 f(1)2.given two functions f(x) = x*2 -3 and g(x) = 3x-4,find the values of:a) f(k+1) -g(k-1) b) f(g(x)) c) g(f(x))3.let f(x) = 1/1-x,finda) f(f(x)) b) f(f(f(x))) c) f
let f be the function that is given by f(x)=(ax+b)/(x^2-c) and that has the following properties:1) the graph of f is symmetric with respect to the y-axis2)lim x-> 2+ f(x)=+00(正无穷)3)f(1)=-2a)determine the values of a,b,cb)write an equatio
1、设二次函数f(x)=ax(平方)+bx+c满足f(x+1)-f(x)=2x
f(x-1)=ax^2+bx+c f(x)=?那位朋友分析下 .