1.

Rationalise show that :1/3-2root2-1/2root2-root7+1/root7-root6-1/root6-root5+1/root5-2=5​

Answer»

Answer:

We have,

(3−

8

)

1

(

8

7

)

1

+

(

7

6

)

1

(

6

5

)

1

+

(

5

2)

1

=5

L.H.S.

(3−

8

)

1

(

8

7

)

1

+

(

7

6

)

1

(

6

5

)

1

+

(

5

−2)

1

By rationalize every part and we get

(3−

8

)

1

×

(3+

8

)

(3+

8

)

(

8

7

)

1

×

(

8

+

7

)

(

8

+

7

)

+

(

7

6

)

1

×

(

7

+

6

)

(

7

+

6

)

(

6

5

)

1

×

(

6

+

5

)

(

6

+

5

)

+

(

5

−2)

1

×

(

5

+2)

(

5

+2)

=

(9−8)

(3+

8

)

8−7

(

8

+

7

)

+

7−6

(

7

+

6

)

6−5

(

6

+

5

)

+

5−4

(

5

+2)

=3+

8

8

7

+

7

+

6

6

5

+

5

+2

=3+2=5

R.H.S

Hence proved.

Step-by-step explanation:

HOPE this HELP you



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