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If (x − 2, 2x + 1, 4x − 3) are consecutive terms of an AP, what are x and d?

Answer and explanation

Correct answer: x = 7, d = 10

For three consecutive terms of an arithmetic progression, the two consecutive differences must be equal. The first difference is (2x + 1) − (x − 2) = x + 3. The second difference is (4x − 3) − (2x + 1) = 2x − 4. Equating them gives x + 3 = 2x − 4, so x = 7. Substitute x = 7 into either difference: d = x + 3 = 7 + 3 = 10. The terms then become 5, 15, and 25, whose differences are both 10, confirming the result. Therefore option C is correct. Every other option fails because its proposed x does not make the two consecutive differences equal.

Related tags

Arithmetic ProgressionConsecutive TermsCommon DifferenceIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics

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