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प्रश्न
Choose the correct alternative:
In the set Q define a ⨀ b = a + b + ab. For what value of y, 3 ⨀ (y ⨀ 5) = 7?
पर्याय
y = `2/3`
y = `(-2)/3`
y = `(-2)/3`
y = 4
उत्तर
y = `(-2)/3`
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