12. If k-1, k + 3 and 3k - 1 are three consecutive terms of a AP, find the value of k.
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hope it is correct .Thanks
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Answer:
For the terms being consecutive terms of an AP,
k+3-(k-1)= 3k-1-(k+3)=common difference
2= 3k-1-k-3
= 2k-4
2k= 2+4
2k=8
k=4
Step-by-step explanation:
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