Q7 of 51 Page 3

If x = 2+, find the value of x3 + .

Given and given to find the value of


We have










We know that ,








By putting we get






The value of is 52.


More from this chapter

All 51 →
5

Simplify :

(i) (ii)


(iii)


(iv)


(v)

6

In each of the following determine rational numbers a and b.

(i) = a-b(ii)= a-


(iii) = a+b (iv) =a+b


(v) = a-b


(vi) =a+b

 8

If x = 3+, find the value of x2+.

 9

Find the value of , it being given that = 1.732 and =2.236