# Ex 12.1, 2 (iv) - Chapter 12 Class 8 Exponents and Powers

Last updated at Sept. 9, 2021 by Teachoo

Last updated at Sept. 9, 2021 by Teachoo

Transcript

Ex 12.1, 2 Simplify and express the result in power notation with positive exponent. (iv) 〖(3〗^(−7)÷ 3^(−10)) × 3^(−5) 〖(3〗^(−7)÷ 3^(−10)) × 3^(−5) = (3^(−7)/3^(−10) )×3^(−5) = (3^(−7−(−10) ) )×3^(−5) = (3^(−7 + 10) )×3^(−5) = 3^3×3^(−5) = 3^(3 + (−5) ) = 3^(3− 5 ) (𝑈𝑠𝑖𝑛𝑔 𝑎^𝑚/𝑏^𝑛 =𝑎^(𝑚 − 𝑛) ) (𝑈𝑠𝑖𝑛𝑔 𝑎^𝑚×𝑎^𝑛=𝑎^(𝑚 + 𝑛) ) = 3^(−2) = 𝟏/𝟑^𝟐

Ex 12.1

Ex 12.1, 1 (i)
Important

Ex 12.1, 1 (ii)

Ex 12.1, 1 (iii)

Ex 12.1, 2 (i) Important

Ex 12.1, 2 (ii)

Ex 12.1, 2 (iii)

Ex 12.1, 2 (iv) You are here

Ex 12.1, 2 (v)

Ex 12.1, 3 (i) Important

Ex 12.1, 3 (ii)

Ex 12.1, 3 (iii)

Ex 12.1, 3 (iv)

Ex 12.1, 3 (v)

Ex 12.1, 4 (i)

Ex 12.1, 4 (ii)

Ex 12.1, 5

Ex 12.1, 6 (i)

Ex 12.1, 6 (ii)

Ex 12.1, 7 (i) Important

Ex 12.1, 7 (ii)

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.