If where a and b are rational then find the values of a and b.

State which of the following numbers are rational and irrational.

i. 2-√5

ii. (3 + √23)-√23

iii.

iv.

v. 5π

Rationalise the denominators of the following:

i.

ii.

iii.

Find:

i. 81^1/2

ii. 64^1/6

iii. (125)^1/3

Find:

i. 4^3/2

ii. 32^2/5

iii. 16^3/4