Arithmetic Progressions Q21 — Class 10 Maths Solution

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Maths Arithmetic Progressions Medium

Find the sum:

(i) $1 + (- 2) + (- 5) + (- 8) + \dots + (- 236)$
(ii) $(4 - \frac{1}{n}) + (4 - \frac{2}{n}) + (4 - \frac{3}{n}) + \dots$ upto $n$ terms
(iii) $\frac{a - b}{a + b} + \frac{3 a - 2 b}{a + b} + \frac{5 a - 3 b}{a + b} + \dots$ to 11 terms.

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