Five marks exercise problems XI — task. Mathematics State Board, Class 10.

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Find the sum

[\frac{a - b}{a + b} + \frac{3 a - 2 b}{a + b} + \frac{5 a - 3 b}{a + b} + ... to 12 terms]

Answer:

The sum \(=\)

i [\frac{i i - i i}{i + i}]

[Note: Enter coefficients and variables in the separate boxes.]

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25. Five marks exercise problems XI