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

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In an AP, (d=11), (n=26), and (S_{26}=4290). Find the first term (a).

Answer and explanation

Correct answer: (\frac{55}{2})

From (4290=13[2a+275]), (a=\frac{55}{2}). In unknown-first-term questions, simplify the bracket first.

Related tags

Find First Term Fraction Answer Ap Sum 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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