Ex 12.1, 1 - Evaluate. (i) 3^-2 (ii) (-4)^-2 (iii) (1/2)^-5 - Class 8

Ex 12.1, 1 - Chapter 12 Class 8 Exponents and Powers - Part 2
Ex 12.1, 1 - Chapter 12 Class 8 Exponents and Powers - Part 3

  1. Chapter 12 Class 8 Exponents and Powers
  2. Serial order wise

Transcript

Ex 12.1, 1 Evaluate. (i) 3^(โˆ’2) 3^(โˆ’2) = 1/3^2 = 1/(3 ร— 3) = ๐Ÿ/๐Ÿ— Ex 12.1, 1 Evaluate. (ii) ใ€–"(โ€“ 4)" ใ€—^(โˆ’2) (โˆ’4)^(โˆ’2) = 1/(โˆ’4)^2 = 1/(โˆ’4 ร— โˆ’4) = ๐Ÿ/๐Ÿ๐Ÿ” Ex 12.1, 1 Evaluate. (ii) (1/2)^(โˆ’5) (1/2)^(โˆ’5) = 1^(โˆ’5)/2^(โˆ’5) = 1/2^(โˆ’5) = 2^5 = 2 ร— 2 ร— 2 ร— 2 ร— 2 = 4 ร— 4 ร— 2 = 16 ร— 2 = 32 (Using (๐‘Ž/๐‘)^๐‘š=๐‘Ž^๐‘š/๐‘^๐‘š ) (1 to the power any number is 1 only)

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Davneet Singh
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.