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Let $\mathrm{S}$ be the set of all values of $\alpha$ such that the points $(\alpha, 6),(-5,0)$ and $(5,0)$ form an isosceles triangle. Then the value of $\sum_{\alpha \in \mathrm{S}} \alpha^{2}$ is
Option: 1
356

Option: 2
18

Option: 3
178

Option: 4
338

Answers (1)

best_answer

$\alpha$ can take 5 values : $0,3,-3,13 .-13$

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Devendra Khairwa

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