Ex 12.1, 7 (i) - Chapter 12 Class 8 Exponents and Powers
Last updated at Sept. 9, 2021 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)
Ex 12.1, 7 (i) Important You are here
Ex 12.1, 7 (ii)
Transcript
Ex 12.1, 7 Simplify. (i) (25 × 𝑡^(−4))/(5^(−3 ) × 10 × 𝑡^(−8) ) (t ≠0) (25 × 𝑡^(−4))/(5^(−3 ) × 10 × 𝑡^(−8) ) = 25/(5^(−3 )× 10) × 𝑡^(−4)/𝑡^(−8) = 25/(5^(−3 )× 10) × 𝑡^(−4)×1/𝑡^(−8) = 25/(5^(−3 )× 10) × 1/𝑡^4 × 𝑡^8/1 = 25/(5^(−3 )× 10) × 𝑡^8/𝑡^4 = 25/(5^(−3 )× 10) × 𝑡^(8 − 4) = 25/(5^(−3 )× 10) × 𝑡^4 = 25/((1/5^3 ) × 10) × 𝑡^4 = (25 × 5^3)/10 × 𝑡^4 = (25 × 5 × 5 × 5)/10 × 𝑡^4 = (25 × 5 × 5)/2 × 𝑡^4 = 𝟔𝟐𝟓/𝟐 𝒕^𝟒 (𝑈𝑠𝑖𝑛𝑔 𝑎^𝑚/𝑏^𝑛 =𝑎^(𝑚 − 𝑛) )
