" "
**Given: ** color(blue)([-15w^0u^-1]/[5u^3]
color(green)("Step 1 : "
**Exponent Rule: ** color(red)(m^0=1
So, color(blue)(w^0=1
**Exponent Rule: ** color(red)(m^-n=1/m^n
So, color(blue)(u^-1=1/u^1=1/u
color(green)("Step 2 : "
**Consider: ** color(blue)([-15w^0u^-1]/[5u^3]
To simplify, use the intermediate results found in Step 1:
rArr [-15(1)(1)]/[5u^3*u]
**Exponent Rule: ** color(red)(a^m*a^n=a^(m+n)
So, u^3*u=u^3*u^1=u^4
rArr -[15]/[5u^4]
color(green)("Step 3 : "
Combine ** color(red)("Like Terms" to simplify**
rArr -(15/5)*(1/u^4)
rArr -(cancel 15^color(blue)(3)/cancel 5)*(1/u^4)
rArr -3*(1/u^4)
rArr -3/u^4
Hence,
color(blue)([-15w^0u^-1]/[5u^3] =-(3)/(u^4)