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Varsity KA Admission Model Test 73
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General Science
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If then what is the value of? √p + 4i = q + i p − q
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3
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5 √p + 4i = q + i ⇒ p + 4i = (q + i)2 = q2 + i2 + 2qi ⇒ p + 4i = q2 − 1 + i2q 2q = 4 ⇒ q = 2; p = q2 − 1 = 22 − 1 = 3 ∴ p − q = 3 − 2 = 1
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