Question

Va rog,ex 22 punctele a si b (cele incercuite)

Answer 1

a) x * (1 + 2 + 3 + ..... + 100) = 60 600
x * 100 * 101 : 2 = 60 600
x * 50 * 101 = 60 600
5050x = 60 600
x = 60600 : 5050
x = 12
b)
(1 + 2 + 3 + ... + 100) : x = 101
1 + 2 + 3 +...... + 100 = 101x
100 * 101 : 2 = 101x
50 * 101 = 101x
101x = 5050
x = 5050 : 101
x = 50