Tuesday

September 2, 2014

September 2, 2014

Posted by **Mike** on Wednesday, May 14, 2008 at 9:55pm.

- pre-calculus -
**Reiny**, Wednesday, May 14, 2008 at 11:51pm3(4^x)-2^(x+2) = -1

3(2^2)^x - (2^x)(2^2) + 1 = 0

3(2^x)^2 - 4(2^x) + 1 = 0

let 2^x = m

3n^2 - 4m + 1 = 0

(3m - 1)(m - 1) = 0

m = 1/3 or m = 1

so 2^x = 1/3

x = ln(1/3)/ln2 = appr. -1.585

or

2^x = 1

x = 0

**Answer this Question**

**Related Questions**

Pre-Calculus/Calculus - I am too embarassed to ask this Calculus (really pre-...

Pre Calculus - Pre Calculus why is sin(-20)/cos 380 equal to tan (-200)

Pre-Calculus - I am in Honors Pre-Calculus and am having a hard time ...

Pre-Calculus - I'm trying to finish up my pre-cal homework and I am stuck on 2 ...

Pre-Calculus - I'm trying to finish up my pre-cal homework and I am stuck on 2 ...

pre-ap pre calculus - To solve an equation by finding x-intercepts, Cynthia ...

Pre Calculus 12 - Im going over my pre calculus 12 exam, and I need help with ...

Pre-Calculus - Can you show me how to find the rectangular equation: r=2cos(...

pre calc - A math teacher uses four algebra books, two geometry books, and three...

pre calculus - 2k^2+5k-9