Question

qual e a soma multiplos de 7 compreendidos entre 20 e 100

Answer 1

0.7,14,21,28,35,42,49,56,63,70,77,84,91,98)

Answer 2

98=21+(n-1)7
77=7n-7
n=10

S=(98+21)10/5
S=119.5
S=595