maths question class 8 ncert question chapter 12 question no 12.1
Answers
Answer:
Evaluate:
(i) 3-2
(ii) (-4)-2
(iii) (\frac { 1 }{ 2 })-5
Solution:
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q1
Ex 12.1 Class 8 Maths Question 2.
Simplify and express the result in power notation with a positive exponent.
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q2
Solution:
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q2.1
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q2.2
Ex 12.1 Class 8 Maths Question 3.
Find the value of
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q3
Solution:
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q3.1
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q3.2
Ex 12.1 Class 8 Maths Question 4.
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q4
Solution:
NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Q4.1
Ex 12.1 Class 8 Maths Question 5.
Find the value of m for which 5m ÷ 5-3 = 55.
Solution:
5m ÷ 5-3 = 55
⇒ 5m-(-3) = 55 [∵ am ÷ an = am-n]
⇒ 5m+3 = 55
Comparing the powers of equal bases, we have
m + 3 = 5
m = 5 – 3 = 2, i.e., m = 2