Q. Find the common ratio of the geometric sequence −11,33,−99,…Answer:
Divide Terms: To find the common ratio of a geometric sequence, we divide any term by the previous term.Let's divide the second term by the first term: 33÷(−11).
Calculate Division: Calculating the division: 33÷(−11)=−3. This gives us the common ratio of the sequence.
Check Consistency: To ensure that −3 is indeed the common ratio, we should check if dividing the third term by the second term also gives us −3. Let's calculate: (−99)÷33.
Check Consistency: To ensure that −3 is indeed the common ratio, we should check if dividing the third term by the second term also gives us −3. Let's calculate: (−99)÷33. Calculating the division: (−99)÷33=−3. This confirms that the common ratio is consistent across these terms.