【单选题】设f(x)=x(x-1)(x-2)…(x-99),则f'(0)=( )
【单选题】下面for循环语句的执行结果是( )。 for(int j=10;j>3;j--) if(j%3 !=O) j--; --j; --j; System.out.println(j); }
【单选题】Vector A = 3i - 4j, vector B = -2i + 3k, where i, j and k are unit vectors along x, y and z axis, respectively. Vector D = A - B is given by
【简答题】解方程 (1)(2x﹣1) 2 ﹣9=0 (2)x 2 ﹣2x﹣99=0 (3)2x 2 ﹣7x=0 (4) .
【简答题】解方程 ①x 2 +2x-99=0 ②(2x-1) 2 =x(6x-3) ③4x 2 -8x+1=0 ④(2x-3) 2 -121=0 ⑤ x 2 -2 3 x+3=0 ⑥2(x-3) 2 =9-x 2 ⑦ -3x 2 -4x+4=0 ⑧(x+1)(x-1)+2(x+3)=8 ⑨(x+1) 2 =4(x-2) 2 .
【简答题】请在该程序段右侧写出其输出结果。 main() {int n[3],j,k,l; for(j=0;j<3;j++) n[j]=0; l=3: for(j=0;j<l;j++) for(k=0;k<l;k++) n[k]=n[j]+1: print(('%d/n',n[1]); }
【简答题】A.SELECT*FROM R WHERE L<'2' B.SELECT LJ FROMR WHERE I<'2' C.SELECT LJ FROMR WHERE J<'2' D.SELECT* FROMR WHERE '5'<'2'
【简答题】a substitute for our shared【L13】______to provide adequate funding
【简答题】.【L13】______were thrown on the different parts of the houses,
【简答题】解方程 (1)(2x-1) 2 -9=0 (2)x 2 -2x-99=0 (3)2x 2 -7x=0 (4) x 2 +3=2 2 x .