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Ex 12.1, 6 (ii) - Chapter 12 Class 8 Exponents and Powers
Last updated at March 22, 2023 by Teachoo
Ex 12.1
Ex 12.1, 1 (i)
Ex 12.1, 1 (ii)
Ex 12.1, 1 (iii) Important
Ex 12.1, 2 (i)
Ex 12.1, 2 (ii) Important
Ex 12.1, 2 (iii)
Ex 12.1, 2 (iv) Important
Ex 12.1, 2 (v)
Ex 12.1, 3 (i)
Ex 12.1, 3 (ii) Important
Ex 12.1, 3 (iii) Important
Ex 12.1, 3 (iv)
Ex 12.1, 3 (v) Important
Ex 12.1, 4 (i) Important
Ex 12.1, 4 (ii)
Ex 12.1, 5 Important
Ex 12.1, 6 (i) Important
Ex 12.1, 6 (ii) You are here
Ex 12.1, 7 (i) Important
Ex 12.1, 7 (ii)
Transcript
Ex 12.1, 6 Evaluate (ii) (5/8)^(−7)×(8/5)^(−4) (5/8)^(−7)×(8/5)^(−4) = 5^(−7)/8^(−7) ×8^(−4)/5^(−4) = 5^(−7)×1/8^(−7) ×8^(−4)×1/5^(−4) = 1/5^7 ×8^7×1/8^4 ×5^4 = 8^7/8^4 ×5^4/5^7 = 8^(7 − 4)×5^(4 − 7) (𝑈𝑠𝑖𝑛𝑔 (𝑎/𝑏)^𝑚=𝑎^𝑚/𝑏^𝑚 ) = 8^3×5^(−3) = 8^3/5^3 = (8 × 8 × 8 )/(5 × 5 × 5) = (64 × 8 )/(25 × 5) = 𝟓𝟏𝟐/𝟏𝟐𝟓
