Question

0.25²ºº⁴×4的2005次方－8¹ºº

Answer 1

(1)0.25^2004*4^2005-8^1000*0.5^3000

=(0.25*4)^2004*4 - (8*0.5^3)^1000

=1*4 - 1^1000=4-3=1

(2)(3xy)^11*(xy/81)^3=3^11*(xy)^11*(xy)^3*(3^4)^(-3)=(xy)^14/3

(3) 原式=8^(-12)*(5/3)^7*8 = 8^(-11)*5^7*3^(-7)