If each term in the sum a1+a2+.....an (n-term) is either 7 or 77, and the sum is equal to 350, which of the following could equal to n?
1) 38
2)39
3)40
4)41
5)42
1) 38
2)39
3)40
4)41
5)42
You could work from answer choices. You will find that 40 would be the answer. The sequence would be that it has 39 -7s and 1 -77, such that the sum=(39*7)+77=273+77=350.Fab_Vr6 wrote:If each term in the sum a1+a2+.....an (n-term) is either 7 or 77, and the sum is equal to 350, which of the following could equal to n?
1) 38
2)39
3)40
4)41
5)42
