Question

y^-3 + y^-4 = ?

Answer 1

\[\frac{1}{y^3}+\frac{1}{y^4}\]

Answer 2

y^4 + y^3
---------
y^7

Answer 3

can you explain? sorry

Answer 4

Do you want an explanation to my answer or to satellite's answer. Not sure what you are looking for.

Answer 5

yes the negative exponent means take the reciprocal. now if you actually want to add them into one fraction you make use a common denominator of
\[y^4\] so you get
\[\frac{1}{y^3}+\frac{1}{y^4}=\frac{y}{y^4}+\frac{1}{y^4}=\frac{y+1}{y^4}\]

Answer 6

but then what's this
y+y^2+y^3+y^4+y^5+y^6+y^7

y^-3 + y^-4 + y^-5 + y^-6 + y^-7 + y^-8 + y^-9

Answer 7

that was suppose to be a fraction