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Math 901: Algebra I Unit 1 Test Study Guide

Math 901: Algebra I Unit 1 Test Study Guide

Math 901: Algebra I Unit 1 Test Study Guide

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even root can never equal a negative number, e.g., y − 1=−12has no real<br />

solution.<br />

12. Identify the common ratio of a geometric sequence.<br />

13. Know and apply the explicit formula for geometric sequences:<br />

n−1<br />

A( n) = a1<br />

⋅r<br />

, where ...<br />

th<br />

A( n) = the actual value of the n term<br />

st<br />

a1<br />

= the 1 term<br />

r = the common ratio between consecutive terms<br />

n = the counting number of the term, such as the 3rd term would have n = 3<br />

14. Find a certain term of a given geometric sequence.

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