I am given the common difference/ratio and tn = 48 and Sn = 33, I need to find the first term but I am not given any terms how do I do this?
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The common difference or the common ratio? I would need to know to determine if this is arithmetic or geometric!
Hello, Cryptnar! I've made some progress . . . Suppose we have a Geometric Progression. We are given: . From [2]: . Multiply [1] by Substitute into [3]: . . . Therefore: .
Originally Posted by Soroban Hello, Cryptnar! I've made some progress . . . Suppose we have a Geometric Progression. We are given: . From [2]: . Multiply [1] by Substitute into [3]: . . . Therefore: . Hey, I don't really understand the a-arn thing what does the "a-" represent?
It's the first term in the sequence
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