Question

138. If X + 1/ X +2=0, the value of
{X^37 - 1/X^100} is
(a) - 2 (b) 2 (c)-1
(d)0
​

Answer 1

Answer:

x=3+2

2

x

1

=

3+2

2

1

×

3−2

2

3−2

2

=3−2

2

(

x

−

2

1

)

2

=x+

x

1

−2

=3+2

2

+3−2

2

−2=4

So,

x

−

x

1

=

4

=±12 Ans