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Results & Lemmas (3)

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Lemma 1 Lemma 1 [7] If p ∈P,then |pn| ≤2 (k = 1, 2, 3,...).
Lemma 1 [7] If p ∈P,then |pn| ≤2 (k = 1, 2, 3, . . .) .
Lemma 2 Lemma 2 [8,9] If p ∈P,then 2p2 = p2 1 + 4 −p2 1  x, 4p3 = p3 1 + 2p1 4 −p2 1  x −p1 4 −p2
Lemma 2 [8,9] If p ∈P,then 2p2 = p2 1 + 4 −p2 1  x, 4p3 = p3 1 + 2p1 4 −p2 1  x −p1 4 −p2
Theorem 1 Theorem 1 If f ∈S∗ c (α, δ, A, B), then a2a4 −a2 3 ≤T 2 4 where T = (A −B) tαδ and tαδ = cos α −δ. The result obtained is sharp.
Theorem 1 If f ∈S∗ c (α, δ, A, B) , then a2a4 −a2 3 ≤T 2 4 where T = (A −B) tαδ and tαδ = cos α −δ. The result obtained is sharp.

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