Question

If a+1/a= 1714,then the value of (a - 1/a) is: -​

Answer 1

a+

a

1

=

4

17

(a−

a

1

)

2

=a

2

+(

a

1

)

2

−4×a×

a

1

a

2

+

a

2

1

−4

=(

4

17

)

2

−4

=

16

289

−4

=

16

289−64

=

16

225

a+

a

1

=

4

17

a−

a

1

=

4

15

2a=

4

17

+

4

15

2a=

4

32

a=

4

32

×

2

1

=4