Question

suma s egal 3 plus 6 plus 9 plus puncte puncte plus 300​

Answer 1

$S = 3 + 6 + 9 + ... + 300$

$S = 1 \times 3 + 2 \times 3 + 3 \times 3 + ... + 3 \times 100$

$S = 3 \times (1 + 2 + 3 + ... + 100)$

$S = 3 \times \frac{100 \times 101}{2}$

$S = 3 \times 50 \times 101$

$S = 15150$

Answer 2

Răspuns: 15150

Explicație pas cu pas:

S = 3 + 6 + 9 + .... + 300 =  3 x (1 + 2 + 3 + ..... + 100) =  3 x 100 x 101 : 2 = 3 x 50 x 101 = 150 x 101 = 15150