Q. Find the common ratio of the geometric sequence −7,56,−448,…Answer:
Identify sequence type: Identify the type of sequence.The given sequence is −7,56,−448,… Each term seems to be multiplied by a common ratio to obtain the next term, indicating that it is a geometric sequence.
Calculate common ratio: Calculate the common ratio using consecutive terms.To find the common ratio, we can divide the second term by the first term.Common Ratio r = −756 = −8
Verify common ratio: Verify the common ratio with another pair of consecutive terms.To ensure that the common ratio is correct, we can also divide the third term by the second term.Common Ratio r = (−448)/56 = −8This confirms that the common ratio is consistent across different pairs of terms.
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