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If (a=20) and (d=-5), what is the second term?

Answer and explanation

Correct answer: 15

In an AP, the second term is \(a_2=a+d\). Here, \(a_2=20+(-5)=20-5=15\). Therefore, option A is correct. 20 is the first term, while 25 would result if the common difference were \(+5\). Exam tip: Adding a negative common difference means subtracting its magnitude.

Related tags

Arithmetic ProgressionCommon DifferenceNegative IntegersSecond TermClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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