Let f(x)=8^x Find x when f(x)=2 is it 4
D danastas New member Joined Apr 25, 2006 Messages 7 Apr 25, 2006 #1 Let f(x)=8^x Find x when f(x)=2 is it 4
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,582 Apr 25, 2006 #2 Is 8<sup>4</sup> equal to 2? Eliz.
D danastas New member Joined Apr 25, 2006 Messages 7 Apr 25, 2006 #3 No, so what I am looking for is 8^something that equals to 2? I am really lost in these type of problems.
No, so what I am looking for is 8^something that equals to 2? I am really lost in these type of problems.
pka Elite Member Joined Jan 29, 2005 Messages 11,995 Apr 25, 2006 #4 Hint: 6413=4\displaystyle 64^{\frac{1}{3}} = 46431=4
skeeter Elite Member Joined Dec 15, 2005 Messages 3,218 Apr 25, 2006 #5 8x=2\displaystyle 8^x = 28x=2 (23)x=2\displaystyle (2^3)^x = 2(23)x=2 23x=21\displaystyle 2^{3x} = 2^123x=21 can you solve for x now ???
8x=2\displaystyle 8^x = 28x=2 (23)x=2\displaystyle (2^3)^x = 2(23)x=2 23x=21\displaystyle 2^{3x} = 2^123x=21 can you solve for x now ???
H happy Full Member Joined Oct 30, 2004 Messages 466 Apr 25, 2006 #7 danastas said: Is x 0 Click to expand... No.
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,582 Apr 25, 2006 #10 danastas said: so what I am looking for is 8^something that equals to 2? Click to expand... Wasn't that the function they gave you? danastas said: Is x 1/3 Click to expand... Check: Is 8<sup>1/3</sup> equal to 2? Eliz.
danastas said: so what I am looking for is 8^something that equals to 2? Click to expand... Wasn't that the function they gave you? danastas said: Is x 1/3 Click to expand... Check: Is 8<sup>1/3</sup> equal to 2? Eliz.
D danastas New member Joined Apr 25, 2006 Messages 7 Apr 25, 2006 #11 Thank you. I have been out of school for about 16 years and I can't remember this stuff. Thank you everyone.
Thank you. I have been out of school for about 16 years and I can't remember this stuff. Thank you everyone.
