Question

if x+1/x=4 find 1:- x*2+1/x*2
2:- x*4+1/x*4​

Answer 1

Answer:

Correct option is

D

34

x−

x

1

=2

squaring both side we have

(x−

x

1

)

2

=4

x

2

+

x

2

1

−2=4

x

2

+

x

2

1

=6

Again squaring both side we have

x

4

+

x

4

1

−2=36

x

4

+

x

4

1

=34