Tính giá trị của biểu thức:
A = 11 . 3 22 . 3 7 - 9 15 ( 2 . 3 14 ) 2
mn giúp em nha
11.322.37-915/(2.314)2
em cần khá gấp
tính:a,A=11.322.37 -915/(2.314)2b,B=(22+29).(34+33)c,C=(75-74).(56+55)d,D=(66+65).(35+34)/6.184
Chứng minh 2+2^2+2^3+2^4+2^5+2^6+2^7+2^8+2^9+2^10+2^11+2^12+2^13+2^14+2^15+2^16+2^17+2^18+...+2^79+2^80
A=4+2^2+2^3+2^4+2^5+2^6+2^7+2^8+2^9+2^10+2^11+2^12+2^13+2^14+2^15+2^16+2^17+2^18+2^19+2^20
Tính A
A=1+2+2^2 +2^3 +2^4 + 2^5 +2^6 +2^7+2^8+2^9+2^10+2^11+2^12+2^13+2^14+2^15+2^16+2^17+2^18+2^19+2^20
A=?
Tinh
1) 1^2 + 3^2 + 5^2 + ... + 97^2 + 99^2
2) 1^2 - 2^2 + 3^2 - 4^2 + ... + 99^2 - 100^2
3) 1.2^2 + 2.3^2 + 3.4^2 + ... + 98.99^2
1.A=2^2+4^2+6^2+...+100^2
2.A=1^2+2^2+3^2+...+99^2
3.A=1^2+2^2+3^2+...+100^2
2+2+2+2+2
2+2+2+2+2
2+2+2+2+0 =
Mn kb mk đi