Question

cati termeni are sirul? a)0,1,2,3....23. b)10,11,12,13....,54. c) 2,4,6....,100. d) 7,9,11,13.....,137. e) 0,5,10,15....,105

Answer 1

a) 24 termeni
b)44 termeni
c) 50 termeni
e) 22 termeni

Answer 2

a) 24 de termeni, cu 0 inclus.
b)54-9= 45
c)50 de termeni ⇒2*(1+2+3+...50)
d)65de termeni ⇒  (137-7):2
e)22  ⇒ 0+5*(1+2+3...+21)=21termeni +termenul 0.