Tính nhanh
A)A=1.2+2.3+3.4+....+98.3+99.2+100.1
B)B=1.100+2.99+3.98+...+98.3+99.2+100.1
Tính nhanh F = 1.100 + 2.99 + 3.98 + ... + 98.3 + 99.2 + 100.1
Tính nhanh 1.100+2.99+3.98+...+98.3+99.2+100.1/1.2+2.3+3.4+...+99.100
Tính tổng:
F = 1.100 + 2.99 + 3.98 +...+ 98.3 + 99.2 + 100.1
Tính nhanh 1.100+2.99+3.98+...+99.2+100.1
Tính:
E = 1^2 + 2^2 + 3^2 +...+ 98^2 + 99^2
F = 1.100 + 2.99 + 3.98 +...+ 98.3 + 99.2 + 100.1
tính tổng
T = 1.100+ 2.99 + 3.98+ ....+ 99.2 + 100.1
F=1.100+2.99+3.98+...+99.2+100.1
Tính nhanh \(\frac{1+\left(1+2\right)+\left(1+2+3\right)+....+\left(1+2+3+...+100\right)}{100.1+99.2+98.3+...+2.99+1.100}\)