Selina Concise Mathematics Class 8 ICSE Solutions Chapter 2 Exponents (Powers)

Selina Concise Mathematics Class 8 ICSE Solutions Chapter 2 Exponents (Powers)

Selina Publishers Concise Mathematics Class 8 ICSE Solutions Chapter 2 Exponents (Powers)

Exponents Exercise 2A – Selina Concise Mathematics Class 8 ICSE Solutions

Question 1.
Evaluate:

Solution:






Question 2.
If 1125 = 3m x 5n; find m and n.
Solution:

Question 3.
Find x, if 9 × 3x = (27)2x-3
Solution:

Exponents Exercise 2B – Selina Concise Mathematics Class 8 ICSE Solutions

Question 1.
Compute:

Solution:









Question 2.
Simplify:

Solution:



Question 3.
Evaluate:

Solution:

Question 4.
Simplify:


Solution:



Question 5.
Simplify:
(xa+b)a-b.(xb+c)b-c.(xc+a)c-a
Solution:

Question 6.
Simplify:

Solution:



Question 7.
(i) (a-2)-2. (ab)-3
(ii) (xny-m)4 × (x3y-2)-n

Solution:



Question 8.
Show that:

Solution:

Question 9.
Evaluate:

Solution:

Question 10.
Evaluate:

Solution:


Question 11.
(m+n)-1 (m-1 + n-1) = (mn)-1
Solution:

Question 12.
Prove that:

Solution:


Question 13.
Find the values of n, when:

Solution:


Question 14.
Simplify:

Solution: