If the rth, (r + 1)th and (r + 2)th coefficients of (1 + x)n are in AP, then n is a root of the equa….

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If the r^th, (r + 1)^th and (r + 2)^th coefficients of (1 + x)ⁿ are in AP, then n is a root of the equation

Options :-

1. x² - x(4r + 1) + 4r² - 2 = 0
2. x² + x(4r + 10) + 4r² - 2 = 0
3. x² + x(4r + 1) + 4r² + 2 = 0
4. None of these

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