SOLUTION: 5^-1 + 2^-1-3^0. ANSWER: -3/10 anyone knows why the answer is -3/10 please give a full break down

Algebra ->  Expressions -> SOLUTION: 5^-1 + 2^-1-3^0. ANSWER: -3/10 anyone knows why the answer is -3/10 please give a full break down       Log On


   

Question 193581: 5^-1 + 2^-1-3^0.
ANSWER: -3/10
anyone knows why the answer is -3/10 please give a full break down
Answer by orca(409) About Me  (Show Source):
You can put this solution on YOUR website!
Note that:
a%5E%28-1%29=1%2Fa
And
a%5E0=1
So
5%5E%28-1%29%2B2%5E%28-1%29-3%5E0
=1%2F5%2B1%2F2-1
=2%2F10%2B5%2F10-10%2F10
=%282%2B5-10%29%2F10
=-3%2F10