a-b-c-R-x-1-ax-4-bx-2-c-1-x-2-1-proof-a-16-

Question Number 140468 by mathdanisur last updated on 08/May/21

a; b; c \in R; \forall ∣ x ∣⩽ 1

∣ {a x}^{4} + {b x}^{2} + c ∣ \sqrt{1 - x^{2}} ⩽ 1; p r o o f ∣ a ∣⩽ 16

Commented by mathdanisur last updated on 11/May/21

S i r, m r . W m y d e a r f r i e n d p l e a s e \dots