Question

1+2+3+4+...+200suma lui gauss​

Answer 1

a = 1+2+3+4+,,,,,+200

a = 200 x (200+1) : 2

a = 100 x 201

a = 20 100

Answer 2

Răspuns:

$1 + 2 + 3 + ... + 200 = \\ \\ (1 + 200) \times 200 \div 2 \\ 201 \times 200 \div 2 \\ 40200 \div 2 = \\ 20100$

asa se face