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Rajesh Kumar

· started a discussion

· 1 Months ago

doubt (Question: 394542.0 )

t+1/t ki value kaise nikali

Question:

  

Options:
A)

79

B)

119

C)

427    

D)

555    

Solution:

Ans: (d)


Knowledge Expert

· commented

· 1 Months ago

Dear student,

taking squr from both sides.
(t-1/t)^2= 11^2
t^2-1/t^2-2=121
t^2-1/t^2=123

taking +2 both sides
t^2-1/t^2 +2=123+2
(t+1/t)^2= 125

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