爱上海后花园

已知二次函数f(x)=ax2+bx+c(a≠0)且满足f(-1)=0,对任意实数x,恒有f(x)-x≥0,并且当x∈(1,2)时f(x)≤((x+1)/2)平方(1)求f(1)的值(2)证明a>0 c>0 (3)且当x∈[-1,1]时,函数g(x)=f(x)-mx(x∈R)是单调函数,求证m≤0或m≥1连起来 每个知识点最好都有

11a2af1=abc=0ac=ba22acc2=b24acb24ac=a22acc2ac20fxx=ax^2b1xc00b124ac02b1b24acb24ac=ac202b1b24ac0x12fxx121f1=abc1ac=b2b12b10b=12f1=abc=2b=12:12b1b24ac0b=120b24ac0b24ac=0ac=ba=14c=143fx=14x212x14gx[11]00gxg\x=f\xmx\=12x12m[11]00012x12m0m12x12m12x121m0012x12m0m12x12m12x121m112b24acgt;01b24ac=0Xb24ac0fxx...

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