Q qbkr21 New member Joined Sep 24, 2006 Messages 16 Jan 29, 2007 #1 Suppose a = 2, b = 3, and c = 5. Then evaluate the following: . . .(ln c^-4)(ln ((a)/(b^-4))^4 Thanks I keep getting -1120 and 800, but both of these are the wrong answer...
Suppose a = 2, b = 3, and c = 5. Then evaluate the following: . . .(ln c^-4)(ln ((a)/(b^-4))^4 Thanks I keep getting -1120 and 800, but both of these are the wrong answer...
skeeter Elite Member Joined Dec 15, 2005 Messages 3,204 Jan 30, 2007 #2 (ln c^-4)(ln ((a)/(b^-4))^4 Click to expand... one factor at a time ... ln(c<sup>-4</sup>) = -4ln(c) ln(a/b<sup>-4</sup>)<sup>4</sup> = 4ln(ab<sup>4</sup>) multiply the two ... -16ln(c)*ln(ab<sup>4</sup>) -16ln(5)*ln(2*3<sup>4</sup>) -16ln(5)*ln(162) = approx -131
(ln c^-4)(ln ((a)/(b^-4))^4 Click to expand... one factor at a time ... ln(c<sup>-4</sup>) = -4ln(c) ln(a/b<sup>-4</sup>)<sup>4</sup> = 4ln(ab<sup>4</sup>) multiply the two ... -16ln(c)*ln(ab<sup>4</sup>) -16ln(5)*ln(2*3<sup>4</sup>) -16ln(5)*ln(162) = approx -131
