Question

what is differential equation ?

Answer 1

AN EQUATION INVOLVING AN ORDERED SEQUENCE OR REAL NUMBERS ({an}∞n=1 ) AND SOME NUMBER IF IT'S DIFFERENCES, WHERE THE FIRST DIFFERENCE IS DEFINED AS Δ(an)=an+1−an AND THE KTHDIFFERENCE IS DEFINED RECURSIVELY AS Δk(an)=Δk−1(an+1)−Δk−1(an) .(MATHEMATICS) MORE BROADLY, ANY RECURRENCE RELATION