Question

Aflati cate numere se gasesc in fiecare dintre secventele
a) 1, 2, 3, ..... 30
b) 10, 11, 12 , ....30
c) 0 , 1, 2, 3....19
d) 17, 18, 19....156 

Answer 1

a) 30-1+1=30
b)30-10+1=21
c)19-0+1=20
d)156-17+1=140
Formula : intre a si b (a<=b) , a si b inclusiv , sunt b-a+1 nr