if the 8th term of an AP is the geometric mean of first and 22nd terms of the same AP .find the common difference of the AP given that the sum of the first and 22 terms of the AP is 770.
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Step-by-step explanation:
the sum of 22 terms of the AP is 770, the average of the numbers in the AP would be 770/22 = 35. This means that the sum of the first and last terms of the AP would be 2 × 35= 70
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