网址:http://m.1010jiajiao.com/timu_id_3229808[举报]
(1)求证:|c|≤1;
(2)求证:当-1≤x≤1时,|g(x)|≤2;
(3)设a>0,当-1≤x≤1时,g(x)的最大值为2,求f(x).