Friday

July 25, 2014

July 25, 2014

Posted by **Halle** on Sunday, June 7, 2009 at 5:13pm.

a) 1/2^x=1/(x+2)

b) 1/2^x>1/x^2

So I know that these functions are rational functions.. and I am trying to solve for x. I tried to solve them by I keep getting stuck with the exponent 2 which is the exponential function.. Help please

- Math -
**bobpursley**, Sunday, June 7, 2009 at 7:49pma) the first one is solved by inspection, x=0 is the only solution.

b) the second is solved by inspection, if x=2 the sides are equal, so then try on each side. If x=1 or x=3, is it true?

at x=1

1/2?>1 False, so x cannot be <2

at x=3

1/8?>1/9 True, so x>2

**Related Questions**

Calculus - We're learning about different kinds of functions and I don't really ...

advance functions gr12 HELP ASAP - Using rational functions solve 7+ (1)/x = 1/(...

advance functions gr12 HELP ASAP - using rational functions solve (x+5)/(x-3)= (...

advance functions gr12 (SORRY LAST ONE HAD A TYPO) - Using rational functions ...

advance functions gr12 - Using rational functions solve (7+ 1)/x = 1/(x-2)

Math advance functions gr 12 - Using rational functions solve 7+ 1(numerator) x...

advance functions gr 12 - Using rational functions solve 3(numerator) 2x-4 (...

advance functions gr 12 - Using rational functions solve 7+ 1(numerator) x (...

advance functions gr 12 - Using rational functions solve x+5(numerator) x-3 (...

advance functions gr 12 - Using rational functions solve x+5(numerator) x-3 (...