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Class 10 Mathematics Arithmetic Progressions (AP)Finding the $n$th term of an APMedium

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What is the 20th term of the AP −45, −36, −27, …?

Answer and explanation

Correct answer: 126

The first term is a = −45 and the common difference is d = 9. Therefore, a₂₀ = a + 19d = −45 + 19 × 9 = 126.

Related tags

Arithmetic-Progression Nth-Term Integers Finding The $N$Th Term Of An Ap Finding The N Th Term Of An Ap Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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