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(1)當(dāng)b＞0時(shí),若對(duì)任意x∈R都有f(x)≤1,證明a≤;

(2)當(dāng)0＜b≤1時(shí),討論:對(duì)任意x∈［0,1］,|f(x)|≤1的充要條件.

(1)當(dāng)b＞0時(shí),若對(duì)任意x∈R都有f(x)≤1,證明a≤2；

(2)當(dāng)b＞1時(shí),證明對(duì)任意x∈［0,1］,|f(x)|≤1的充要條件是b-1≤a≤2；?

(3)當(dāng)0＜b≤1時(shí),討論:對(duì)任意x∈［0,1］,|f(x)|≤1的充要條件.?

(1)當(dāng)b>0時(shí),若對(duì)任意x∈R都有f(x)≤1,證明a≤2;

(2)當(dāng)b>1時(shí),證明對(duì)任意x∈［0,1］,|f(x)|≤1的充要條件是b-1≤a≤2.