# Arithmetic seriesWatch

#1
The first three terms of an arithmetic series are Y-1, 2y and 4Y-2. Find the fourth and fifth terms. Do not include Y in the answer
0
6 days ago
#2
You add the first to the third one and divide it by two to reach to the second one
Last edited by bia0; 6 days ago
0
#3
why you divided it by 2
(y-1+4y-2)/2=2y
0
6 days ago
#4
(Original post by bia0)
(y-1
The terms are
Please edit your post - it is against the rules to post solutions.
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6 days ago
#5
I've learned it in theory, but if you say that the first term is a1, then the second is a1 + the ratio and the third is a1 + 2*ratio
Then if you add the first and the third and divide them by 2, you get the second one
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