☹➞cac ban giup minh cau nay voi 

☛ tinh tong 

M = 1+\(\dfrac{1}{5}\)+\(\dfrac{3}{35}\)+...\(\dfrac{3}{9603}\)+\(\dfrac{3}{9999}\)

➜giup minh nhanh nhe minh dang can gap lam moi nguoi a 

➞thank you cac ban ❕

c) 34/15 +-25/6-4/15+7/6

= (34/15+-4/15)+(-25/6+7/6)

= 30/15+(-3)

= 30/15+(-45)

=-15/15

= -1