Single Choice

Express as a pure surd: $$2\sqrt [ 3 ]{ 4 } $$

A$$\sqrt [ 2 ]{ 32 } $$
B$$\sqrt [ 2 ]{ 16 } $$
C$$\sqrt [ 3 ]{ 32 } $$
Correct Answer
D$$\sqrt [ 3 ]{ 128} $$

Solution

A surd in which the whole of the rational number is under the radical sign and makes the radicand, is called pure surd.
$$2\sqrt[3]{4} = \sqrt[3]{2^3} \times \sqrt[3]{4} = \sqrt[3]{8}\times \sqrt[3]{4} =\sqrt [3]{32}$$

SIMILAR QUESTIONS

Exponents and Powers

Express as a pure surd: $$x\sqrt{x+y}$$

Exponents and Powers

Express as a pure surd: $$3\sqrt [ 4 ]{ 5 }$$

Exponents and Powers

Express as a pure surd: $$a \sqrt [ 3 ]{ { b }^{ 2 } } $$

Exponents and Powers

Express as a mixed surd: $$\sqrt{80}$$

Exponents and Powers

Express as a mixed surd: $$\sqrt [ 3 ]{ 256} $$

Exponents and Powers

Express as a mixed surd: $$\sqrt [ 4 ]{ 1280 } $$

Exponents and Powers

Express as a mixed surd: $$\sqrt [ 5 ]{ 320 } $$

Exponents and Powers

$$\sqrt{12\sqrt{5}+2\sqrt{55}}=$$...........

Exponents and Powers

If $$x=\sqrt [ 3 ]{ 9 } ,y=\sqrt [ 4 ]{ 11 } ,z=\sqrt [ 6 ]{ 17 } $$ then:

Exponents and Powers

Find the true statement for operations on surds

Contact Details