Question 277453
 (-2/5)((k-1)^-3) in the form of a fraction.
:
 {{{(-2/5)((k-1)^-3)}}}.
The reciprocal gets rid of the negative on the exponent. then multiply the fractions:
 {{{(-2/5)(1/(k-1)^3)}}} = {{{-2/(5(k-1)^3)}}}; may be what they mean here