In a geometric sequence, the 2nd term is 10 and the 3rd term is 20. Find the first term .
Answer & Analysis
Analysis
Question Analysis
This question tests the student's ability to find the first term of a geometric sequence given two consecutive terms.
Key Concept Explanation
The common ratio can be found by dividing the 3rd term by the 2nd term. Once is known, the first term can be calculated using the relationship between the 2nd term and .
Step-by-step Solution
1. Calculate the common ratio :
Want More Practice Questions?
Access thousands of practice questions with detailed explanations on Scholardog.