Having trouble with these exponent problems. (2a^-2b^5 over 4a^2b^7 )^-2 Help
L lillyiggie New member Joined Oct 2, 2005 Messages 2 Oct 2, 2005 #1 Having trouble with these exponent problems. (2a^-2b^5 over 4a^2b^7 )^-2 Help
D Denis Senior Member Joined Feb 17, 2004 Messages 1,707 Oct 2, 2005 #2 lillyiggie said: Having trouble with these exponent problems. (2a^-2b^5 over 4a^2b^7 )^-2 Help Click to expand... Remember that: n^(-p) = 1 / n^p and (n^p)^k = n^(pk) [(2 a^-2 b^5) / (4 a^2 b^7 )]^-2 = (1 / (2 a^4 b^2))^-2 = 1/ [(1 / (2 a^4 b^2))^2] = (2 a^4 b^2)^2 = 4 a^8 b^4 If not clear, see your teacher...or perhaps someone else will make it clearer...
lillyiggie said: Having trouble with these exponent problems. (2a^-2b^5 over 4a^2b^7 )^-2 Help Click to expand... Remember that: n^(-p) = 1 / n^p and (n^p)^k = n^(pk) [(2 a^-2 b^5) / (4 a^2 b^7 )]^-2 = (1 / (2 a^4 b^2))^-2 = 1/ [(1 / (2 a^4 b^2))^2] = (2 a^4 b^2)^2 = 4 a^8 b^4 If not clear, see your teacher...or perhaps someone else will make it clearer...