S = n=2∑∞31∗7n−13n−1I know how to use the geometric series very well but I am confused because this one problem starts at n=2 which changed the simplified sum. I need some help writing the first term because I simply cant find a good example of this.
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Thanks in advance
I see this as rather standard geometric series.I know how to use the geometric series very well but I am confused because this one problem starts at n=2 which changed the simplified sum. I need some help writing the first term because I simply cant find a good example of this.
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That's what I was going to say!I see this as rather standard geometric series.
First term n=2, a=71, the common ratio r=73 then the sum 1−7371=41
SEE HERE