Find the numbers of the ap -12,-9,-6,.....,21 If one is added to each term of the ap then find the sum of all the terms of the Ap thus obtained?
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Find the numbers of the ap -12,-9,-6,.....,21 If one is added to each term of the ap then find the sum of all the terms of the Ap thus obtained?
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Answer:
66
Step-by-step explanation:
Sn= n/2 (2a1 + (n-1)d)
Answer:
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