A andyjl Full Member 10+ Year Member 5+ Year Member 15+ Year Member Joined Apr 16, 2007 Messages 168 Reaction score 0 May 2, 2007 #1 what is the value of x if (4^2x)(4^x)(2^3) = 128? how do you work this out? ans is x = 2/3 Members don't see this ad.
what is the value of x if (4^2x)(4^x)(2^3) = 128? how do you work this out? ans is x = 2/3 Members don't see this ad.
D domonas Junior Member 10+ Year Member 5+ Year Member 15+ Year Member Joined Jul 26, 2006 Messages 118 Reaction score 4 May 2, 2007 #2 andyjl said: what is the value of x if (4^2x)(4^x)(2^3) = 128? how do you work this out? ans is x = 2/3 Click to expand... (4^2x)(4^x) = 4^3x 2^3 = 8 128/8 = 16 4^3x = 16 3x = 2 x=2/3 Upvote 0 Downvote
andyjl said: what is the value of x if (4^2x)(4^x)(2^3) = 128? how do you work this out? ans is x = 2/3 Click to expand... (4^2x)(4^x) = 4^3x 2^3 = 8 128/8 = 16 4^3x = 16 3x = 2 x=2/3
