Class 9th math Rs aggarwal1. Number system Exercise- 1f

 

1. Number system 

Exercise- 1f

1.Write the rationalising factor of the denominator in 1/(√2+√3)

Solution:- 

2.Rationalise the denominator of each of the following.

Solution:- 

Q. 11 11. if x=3+2√2, check whether x+(1/x) is rational or irrational

Solution:- 

12. if x=2-√3, find the value of (x-1/x)^3

Solution:- 

13. If x=9-4√5, find the value of x^2+(1/x^2)

Solution:-

14. if x=(5-√21)/2 , find the value of x+(1/x)

Solution:-