Q. 143.7( 3 Votes )

How many arithmet

Answer :

Given: Two sets: {1, 2, 3} & {2, 3, 4}


To find: number of A.P. with 10n terms whose first term is in the set {1, 2, 3} and whose common difference is in the set {2, 3, 4}


Number of arithmetic progressions with 10 terms whose first term are in the set {1, 2, 3} and whose common difference is in the set {2, 3, 4} are:3 × 3=9


(3 because there are three elements in the set {1, 2, 3} and another 3 because there are three elements in the set {2, 3, 4})


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