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Hi-guyz-For-R-1-2-3-4-5-6-223-224-and-S-2-3-4-5-6-7-224-225-Prove-that-R-lt-1-15-lt-S-




Question Number 137005 by greg_ed last updated on 28/Mar/21
Hi, guyz !  For R = (1/2)×(3/4)×(5/6)×...×((223)/(224))   and             S = (2/3)×(4/5)×(6/7)×...×((224)/(225)) .  Prove that :  R < (1/(15)) < S.
$$\boldsymbol{\mathrm{Hi}},\:\boldsymbol{\mathrm{guyz}}\:! \\ $$$$\boldsymbol{\mathrm{For}}\:\boldsymbol{\mathrm{R}}\:=\:\frac{\mathrm{1}}{\mathrm{2}}×\frac{\mathrm{3}}{\mathrm{4}}×\frac{\mathrm{5}}{\mathrm{6}}×…×\frac{\mathrm{223}}{\mathrm{224}}\:\:\:\boldsymbol{\mathrm{and}}\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\boldsymbol{\mathrm{S}}\:=\:\frac{\mathrm{2}}{\mathrm{3}}×\frac{\mathrm{4}}{\mathrm{5}}×\frac{\mathrm{6}}{\mathrm{7}}×…×\frac{\mathrm{224}}{\mathrm{225}}\:. \\ $$$$\boldsymbol{\mathrm{Prove}}\:\boldsymbol{\mathrm{that}}\::\:\:\boldsymbol{\mathrm{R}}\:<\:\frac{\mathrm{1}}{\mathrm{15}}\:<\:\boldsymbol{\mathrm{S}}. \\ $$
Commented by greg_ed last updated on 01/May/21
no answer for this thing ?
$$\mathrm{no}\:\mathrm{answer}\:\mathrm{for}\:\mathrm{this}\:\mathrm{thing}\:?\: \\ $$

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