E= 2925
F= 951
nho k cho minh nha minh dang can diem
E= 1x1+3x3+5x5+7x7+9x9+11x11+13x13+15x15+17x17+19x19+21x21+25x25=2925
F= 4x4+7x7+10x10+13x13+16x16+19x19=951
bai nhu vay day cho minh xin mot k nha ko co cung duoc
E= 2925
F= 951
nho k cho minh nha minh dang can diem
E= 1x1+3x3+5x5+7x7+9x9+11x11+13x13+15x15+17x17+19x19+21x21+25x25=2925
F= 4x4+7x7+10x10+13x13+16x16+19x19=951
bai nhu vay day cho minh xin mot k nha ko co cung duoc
Tổng: 1 + 2x2 + 3x3 + 4x4 + 5x5 + 6x6 + 7x7 + 8x8 + 9x9 + 10x10 là bao nhiêu?
1x1=
2x2=
3x3=
4x4=
5x5=
6x6=
7x7=
8x8=
9x9=
10x10=
11x11=
12x12=
13x13=
14x14=
15x15=
16x16=
17x17=
18x18=
19x19=
20x20=
So sánh số sau: 1/2x2+1/3x3+1/4x4+1/5x5+1/6x6+1/7x7+1/8x8 với 1.
Tính
A=1x2x3+2x3x3+3x4x3+4x5x3+....+98x99x3
B=1x2+2x3+3x4+4x5+...+98x99
C=1x1+2x2+3x3+4x4+5x5+...+98x98
So sánh tổng sau vs \(\frac{1}{45}\)
M = \(\frac{2}{3x3}+\frac{2}{5x5}+\frac{2}{7x7}+\frac{2}{9x9}\)
Chứng minh S < 2
S = \(\frac{1}{1x1}+\frac{1}{2x2}+\frac{1}{3x3}+\frac{1}{4x4}+...+\frac{1}{10x10}\)
lm được 5 tích
1x1=
2x2=
3x3=
4x4=
5x5=
6x6=
7x7=
8x8=
9x9=
10x10=
11x11=
12x12=
13x13=
14x14=
15x15=
16x16=
17x17=
18x18=
19x19=
20x20=
21x21=
22x22=
23x23=
24x24=
25x25=
26x26=
27x27=
28x28=
29x29=
30x30=
31x31=
32x32=
33x33=
34x34=
35x35=
36x36=
37x37=
38x38=
39x39=
40x40=
AI NHANH MIK TICK CHO NHA!!!
1x1!+2x2!+3x3!+4x4!+...+100x100! = ?
giai thừa nhé
2x2=
3x3=
4x4=
5x5=