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A Math student was given the following geometric sequence: ___, ___, ___, 1458, ___, ___, 1 062 882 and asked to find the common ratio.
A Math student was given the following geometric sequence:
___, ___, ___, 1458, ___, ___, 1 062 882
and asked to find the common ratio. The students work is shown below.
Step 1 - 1 062 882 = ar^6
Step 2 - 1458 = ar^3
Step 3 - 1062882=ar^6/1458=ar^3
Step 4 - 729 = r^2
Step 5 - r = 27
a) Unfortunately, the student made an error. Identify the error and make the correction. [2 Marks]
b) Use an appropriate formula to determine the first term. [2 Marks]
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