In this paper, we investigate the frequency of zeros of solutions of linear differential equations of the form
w(k)+∑\limits
{\jmath}=1k−1Qjw(j)+(
Q0+
ReP)
w=0, where
k{≥}2, and where
Q0, …,
Qk−1,
R and
P are arbitrary polynomials with
R{¬≡}0 and
P non-constant. All solutions
f{¬≡}0 of such an equation are entire functions of infinite order of growth, but there are examples of such equations which can possess a solution whose zero-sequence has a finite exponent of convergence. In this paper, we show that unless a special relation exists between the polynomials
Q0, …,
Qk−1, and
P, all solutions of such an equation have an infinite exponent of convergence for their zero-sequences. This result extends earlier results for the equation,
w(k)+(
Q0+
ReP)
w=0.
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