The anti MAths
Level
2
Right this question has no correct answer all I'm asking is for you to choose the answer that has the strongest argument.
S=1-1+1-1+1-1................................ for infinity
what is the answer
1/2
1
0
2
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1 solution
A great way to solve this is by using the fact that the sum of infinite terms of a gp is a/1-r.
But it is not applicable when the common ratio is > or =1.
Thus we make 2 cases. in the 1st, the answer is 1.& in the other it is 0.
So we average it to get 1/2