If 3+√7/3-√7=a+b√7 then (a,b) =
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2
Answer:
By rationalizing denominator ,
(3 +√7)/( 3 - √7) = (3 +√7)²/( (3)² - (√7)²)
= (16 + 6√7) / 9 - 7
= 8 + 3√6
∴ a = 8 and b = 3
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Answered by
2
Multiply
on both numerator and denomerator
(3+√7)² / (3-√7)(3+√7) = a+b√7
⇒9 + 7 + 6√7 / 3² -√7² = a+b√7
⇒16+ 6√7 / 9-7 =a+b√7
⇒16+ 6√7 / 2 =a+b√7
⇒2(8+3√7)/2 =a+b√7
⇒8 +3√7 =a+b√7
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