...4在闭区间t,t+1 (t∈R)上的最小值记为g(t).(1)试写出g(t)的函数表...
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发布时间:2024-10-05 01:15
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热心网友
时间:2024-10-05 01:36
f(x)=x^2-4x-4
=(x-2)^2-8
(i)若t<1,则t+1<2
g(t)=f(t+1)=(t-1)^2-8=t^2-2t-7
(ii)若1<=t<=2,则2<=t+1<=3
g(t)=f(2)=-8
(iii)若t>2,则t+1>3
g(t)=f(t)=t^2-4t-4
因此有:
g(t)=t^2-4t-4 (t>2)
g(t)=-8 (1<=t<=2)
g(t)=t^2-2t-7 (t<1)
热心网友
时间:2024-10-05 01:36
答案见图片,我已经发给你了