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Class 10 Mathematics Arithmetic Progressions (AP)Finding the sum of the first $n$ terms of an APMedium

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In an AP, (a=17), (d=2), and (S_n=580). Find (n).

Answer and explanation

Correct answer: (20)

From (\frac{n}{2}[34+2(n-1)]=580), (n=20). After forming the equation, you can also check using options.

Related tags

Find N Ap Sum Options Check Finding The Sum Of The First $N$ Terms Of An Ap Finding The Sum Of The First N Terms Of An Ap Arithmetic Progressions (Ap)Arithmetic Progressions Ap Mathematics

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