答案long int sum; scanf("%d",n); while(ia[j]) ntf( 下标 : % d\n 最大值 :% d ” , j, max) I/j um(x,y) / return; nt c;
定义域:-5<x<1 f(x)=log3(1-x)+log3(x+5) = log3[(1-x)(x+5)] = log3[-x²-4x+5] = log3[-(x-2)²+9]0 < -(x-2)²+9 ≤ 9 log3[-(x-2)²+9]≤2 值域(-∞,2】