ICSE Class 8 Maths Selina Solutions Chapter 2 Exponents ...
Exercise 2(A)
Question 1. Evaluate: (i) (3-1 ? 9-1) ? 3-2 Solution:
(ii) (3-1 ? 4-1) ? 6-1 Solution:
(iii) (2-1 + 3-1)3 Solution:
(iv) (3-1 ? 4-1)2 Solution:
(v) (22 + 32) ? (1/2)2
ICSE Class 8 Maths Selina Solutions Chapter 2 Exponents (Powers)
ICSE Class 8 Maths Selina Solutions Chapter 2 Exponents (Powers) Solution: = (2 ? 2) + (3 ? 3) ? (? ? ?) = 4 + 9 ? ? = 13/4 = 3? (Simplifying the given equation) (vi) (52 - 32) ? (2/3)-3 Solution:
(vii) Solution:
(viii) Solution:
(ix) Solution:
ICSE Class 8 Maths Selina Solutions Chapter 2 Exponents (Powers)
(x) (5-1 ? 3-1) + 6-1 Solution:
Question 2. 1125 = 3m ? 5n; find m and n Solution: 1125 = 32 ? 53 The factors of 1125 are 3 ? 3 ? 5 ? 5 ? 5
Therefore 1125 = 3 ? 3 ? 5 ? 5 ? 5 Now comparing, 32 ? 53 = 3m ? 5n Therefore m=2, n=3 Question 3. Find x, if 9 ? 3x = (27)2x - 3 Solution: 9 ? 3x = (27)2x - 3 32 ? 3x = (3 ? 3 ? 3)2x - 3 (Simplifying the given equation) 3x + 2 = (3)3(2x - 3) 3x + 2 = (3)6x - 9 Since bases are same, compare them, x + 2 = 6x - 9 6x ? x = 9 + 2 5x = 11 x = 11/2 (Shifting the terms)
ICSE Class 8 Maths Selina Solutions Chapter 2 Exponents (Powers)
Exercise 2(B)
Question 1. Compute:
(i) 18 ? 30 ? 53 ? 22
Solution:
18 ? 30 ? 53 ? 22
= 1 ? 1 ? 5 ? 5 ? 5 ? 2 ? 2
= 125 ? 4
(Simplifying the given equation)
= 500
(ii) (47)2 ? (4-3)4
Solution: (47)2 ? (4-3)4 = 414 ? 4-12 = 414 ? 12 = 42
= 4 ? 4 = 16
(Simplifying the given equation)
(iii) (2-9 ? 2-11)3
Solution: = (2-9 + 11)3 = (22)3 = 26
(Simplifying the given equation)
= 2 ? 2 ? 2 ? 2 ? 2 ? 2 = 64
(iv)
Solution:
(v) Solution:
ICSE Class 8 Maths Selina Solutions Chapter 2 Exponents (Powers)
(vi) (12)-2 ?33 Solution: = (2 ? 2 ? 3)-2 ? 33 = (22 ? 3)-2 ? 33 = 2- 2 ? 2 ? 3-2 ? 33 =2-4 ? 3-2 + 3 ? 33 = 2-4 ? 31
(vii) (-5)4 ? (-5)6 ? (-5)9 Solution: = (-5)4 + 6 - 9 = (-5)1 = -5 (viii) Solution:
(ix) 90 ? 4-1 ? 2-4 Solution:
= 24-2 = 22 = 4
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- 0 1 2 3 4256 0 0 7 04248 69 0
- chapter 3 multivariate distributions
- chapter 1 chemical foundations 1 8 density
- table 91 occupancy rates in community hospitals and
- solutions hw 13 university of california berkeley
- bits bytes and integers
- tabla de equivalencias pulgadas a milímetros mitxelo
- solutions to hw5 problem 3 1 iupui
- math 2260 exam 1 practice problem solutions
- 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 mcmaster university
Related searches
- class 8 maths solutions
- cbse class 8 maths book pdf
- cbse class 8 maths solutions
- ncert class 8 maths solutions learn cbse
- ncert book class 8 maths solutions
- ncert class 8 maths pdf
- ncert class 8 maths solutions pdf
- class 8 maths pdf download
- class 8 maths solution
- cbse class 8 maths book
- class 8 maths 1 2
- ncert class 8 maths book pdf