NCERT Solutions
Class 9 - Mathematics - Chapter 1: NUMBER SYSTEMS
EXERCISE 1.5

Question. 1

Find the values of the following:

(i) \(64^{1/2}\)
(ii) \(32^{1/5}\)
(iii) \(125^{1/3}\)

Answer:

(i) 8

(ii) 2

(iii) 5

Question. 2

Find the values of the following:

(i) \(9^{3/2}\)
(ii) \(32^{2/5}\)
(iii) \(16^{3/4}\)
(iv) \(125^{-1/3}\)

Answer:

(i) 27

(ii) 4

(iii) 8

(iv) \(\dfrac{1}{5}\)  [\((125)^{-1/3} = (5^{3})^{-1/3} = 5^{-1}\)]

Question. 3

Simplify the following:

(i) \(2^{2/3} \cdot 2^{1/5}\)
(ii) \(\left(\dfrac{1}{3^{3}}\right)^{7}\)
(iii) \(\dfrac{11^{1/2}}{11^{1/4}}\)
(iv) \(7^{1/2} \cdot 8^{1/2}\)

Answer:

(i) \(2^{13/15}\)

(ii) \(3^{-21}\)

(iii) \(11^{1/4}\)

(iv) \(56^{1/2}\)

NCERT Solutions Class 9 – Mathematics – Chapter 1: NUMBER SYSTEMS – EXERCISE 1.5 | Detailed Answers