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Ex 7.2, 1 (x) - Chapter 7 Class 8 Cubes and Cube Roots
Last updated at Sept. 1, 2021 by Teachoo
Ex 7.2
Ex 7.2, 1 (i)
Ex 7.2, 1 (ii) Important
Ex 7.2, 1 (iii)
Ex 7.2, 1 (iv) Important
Ex 7.2, 1 (v)
Ex 7.2, 1 (vi)
Ex 7.2, 1 (vii) Important
Ex 7.2, 1 (viii)
Ex 7.2, 1 (ix) Important
Ex 7.2, 1 (x) You are here
Ex 7.2, 2 (i)
Ex 7.2, 2 (ii) Important
Ex 7.2, 2 (iii)
Ex 7.2, 2 (iv)
Ex 7.2, 2 (v) Important
Ex 7.2, 2 (vi) Important
Ex 7.2, 2 (vii)
Ex 7.2, 3 Important
Transcript
Ex 7.2, 1 Find the cube root of each of the following numbers by prime factorisation method. (x) 91125We see that 91125 = 3 × 3 × 3 × 3 × 3 × 3 × 5 × 5 × 5 Since all factors occur in triplets ∴ 91125 is a perfect cube. Cube root of 91125 = 3 × 3 × 5 = 9 × 5 = 45
