CBSE Class 9 Answered
sir tommorow exam
Asked by pranavjain | 05 Mar, 2010, 03:44: PM
Expert Answer
x = (
7 + 6)/(7 - 6)
Rationalize,
x = (7 + 6)2/(7 - 6) = 7 + 242 + 6 = 13 + 242
x2 = 169 + 5242 + 168 = 337 + 5242
(x + 1/x)2 = x2 + 2 + 1/x2
= 337 + 5242 + 2 + 1/(337 + 5242)
Rationalize the last term,
= 337 + 5242 + 2 + (337 - 5242)
= 676
Regards,
Team,
TopperLearning.
Answered by | 05 Mar, 2010, 09:59: PM
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