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Question-144875

Question Number 144875 by lapache last updated on 30/Jun/21 Answered by Dwaipayan Shikari last updated on 30/Jun/21 $$\frac{\mathrm{1}}{{n}!}\int_{\mathrm{0}} ^{\infty} {x}^{{n}} \mathrm{sin}\:\left({x}\right){e}^{−{x}} {dx} \\ $$$$=\frac{\mathrm{1}}{\mathrm{2}{in}!}\int_{\mathrm{0}} ^{\infty}…

if-you-know-that-the-probability-of-a-picture-appearing-when-acoin-is-tossed-is-2-5-then-the-probability-of-getting-writings-when-this-coin-is-tossed-6-times-

Question Number 144801 by mohammad17 last updated on 29/Jun/21 $${if}\:{you}\:{know}\:{that}\:{the}\:{probability}\:{of}\:{a}\:{picture} \\ $$$${appearing}\:{when}\:{acoin}\:{is}\:{tossed}\:{is}\:\mathrm{2}/\mathrm{5} \\ $$$${then}\:{the}\:{probability}\:{of}\:{getting}\:{writings}\: \\ $$$${when}\:{this}\:{coin}\:{is}\:{tossed}\:\mathrm{6}\:{times}\:? \\ $$ Commented by mohammad17 last updated on 29/Jun/21…

let-ABC-be-a-escalene-triangle-of-area-7-Let-A-1-be-a-point-on-the-side-BC-and-let-B-1-and-C-1-be-points-on-the-sides-AC-and-AB-such-that-AA-1-BB-1-and-CC-1-are-parallel-Find-the-area-of-tr

Question Number 79266 by Maclaurin Stickker last updated on 24/Jan/20 $${let}\:{ABC}\:{be}\:{a}\:{escalene}\:{triangle}\:{of} \\ $$$${area}\:\mathrm{7}.\:{Let}\:{A}_{\mathrm{1}} \:{be}\:{a}\:{point}\:{on}\:{the}\:{side} \\ $$$${BC},\:{and}\:{let}\:{B}_{\mathrm{1}} \:{and}\:{C}_{\mathrm{1}} \:{be}\:{points}\:{on} \\ $$$${the}\:{sides}\:{AC}\:{and}\:{AB},\:{such}\:{that} \\ $$$${AA}_{\mathrm{1}} ,\:{BB}_{\mathrm{1}} \:{and}\:{CC}_{\mathrm{1}} \:{are}\:{parallel}.\:{Find}…