Mathematics, 11.03.2021 02:50 smilxess

the first term of an AP is a and the common different is -1.if the sum of the first n term is equal to the sum of the first 3n terms of the progression. express a in terms of n, obtain the value of a when n is 10 and hence find the sum of the first 30 term of the progression

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the first term of an AP is a and the common different is -1.if the sum of the first n term is equal...

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the first term of an AP is a and the common different is -1.if the sum of the first n term is equal to the sum of the first 3n terms of the progression. express a in terms of n, obtain the value of a when n is 10 and hence find the sum of the first 30 term of the progression​

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the first term of an AP is a and the common different is -1.if the sum of the first n term is equal to the sum of the first 3n terms of the progression. express a in terms of n, obtain the value of a when n is 10 and hence find the sum of the first 30 term of the progression