The reciprocal of 8-3 is _______________
1/83
83
can't be determined
None of these
Rationalise the denominator of 3/√5.
3
3√5/5
3/√5
3√5
The rationalising factor of 7 - √7 is _____.
7√7
√7
7
(7-√7) (7 + √7 ) =72 - (√7)2
= 49 -7 = 42.7+√7 is the rationalising factor of 7-√7
If x = 5 - 4 √6, then 1/x = ______.
Simplify
39√3+1
78√3
The union of set of rational numbers and the set of irrational numbers is called the set of _______.
Real numbers
Rational numbers
Irrational numbers
The lowest rationalising factor of 5√2 is _______.
5√2
5
2
√2
Rationalise the denominator of
3 + 2√2
1 +2√2
3 - 2√2
1 - 2√2
If a and b are two positive numbers such that ab is not a perfect square then an irrational number between a and b is ______.
(a+b)/2
ab
√(a+b)
√ab
For any rational number a, ao =
0
1
a
