1.

(SECTION-A)• Each question carry 2 Marks.Q1. If (x - 1/x) =6, the find x2 + 1/x?.​

Answer»

Step-by-step EXPLANATION:

X+

x

1

=6

⇒(x+

x

1

)

2

=x

2

+

x

2

1

+2X.

x

1

=x

2

+

x

2

1

+2

⇒x

2

+

x

2

1

=(x+

x

1

)

2

−2=6

2

−2=34

⇒(x

2

+

x

2

1

)

2

=x

4

+

x

4

1

+2x

2

.

x

2

1

=x

4

+x

4

+

x

4

1

+2

⇒x

2

+

x

2

1

=(x

2

+

x

2

1

)

2

−2=34

2

−2

=1154.

Hence, the ANSWER is 1154.


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