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Which of the following sequeces in AP will have common difference 3, where n is an Integer?(a) an = 2n^2 + 3n(b) an = 2n^2 + 3(c) an = 3n^2 + 3n(d) an = 5 + 3nI had been asked this question by my college professor while I was bunking the class.Asked question is from Arithmetic Sequences in section Basic Structures: Sets, Functions, Sequences, Sums and Matrices of Discrete Mathematics

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