exponents as a fraction
2^{-3} + 2^{-2} = 1/8 + 1/4 = 3/8 <==Answer
exponents as a fraction
2^{-3} + 2^{-2} = 1/8 + 1/4 = 3/8 <==Answer
In this equation start from here
2^-3 is equal to 1/8
2^-2 is equal to 1/4
So in order to figure to this problem out you need to find the GCF or Greatest Common Factor between 1/8, 1/4 and so in this question it is 8 so.
1/8 + 1/4(2) = x
1/8 + 2/8 = x
3/8 = x
Your answer is 3/8.
Alexander and Robert have already showed how to find the answer, but I just wanted to add that a negative exponent can be written as a positive exponent by taking the reciprocal, ie:
a^{-x} = 1/a^{x}
so:
2^{-3} = 1/2^{3} = 1/8
and
2^{-2} = 1/2^{2} = 1/4