SOLUTION: Please help me solve this problem {{{ 2^-1 + 2^0 + 2^1 }}} I don't understand how to solve this at all. Thank-you very much for your help. 3 1/2

Algebra ->  Exponents -> SOLUTION: Please help me solve this problem {{{ 2^-1 + 2^0 + 2^1 }}} I don't understand how to solve this at all. Thank-you very much for your help. 3 1/2       Log On


   

Question 81034: Please help me solve this problem +2%5E-1+%2B+2%5E0+%2B+2%5E1+
I don't understand how to solve this at all. Thank-you very much for your help. 3 1/2
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
solve this problem +2%5E-1+%2B+2%5E0+%2B+2%5E1+
Rules to use:
highlight%28a%5E%28-m%29=1%2F%28a%5Em%29%29
In other words, anything raised to a negative power can be written as 1 over that thing to the positive power.
highlight%28a%5E0=1%29
In other words, anything to the zero power is 1.
:
%281%2F2%5E1%29%2B1%2B2
1%2F2%2B1%2B2
1%2F2%2B3
1%2F2%2B3%282%2F2%29
1%2F2%2B6%2F2
7%2F2
Happy Calculating!!!! 3 1/2