Question Number 182432 by SANOGO last updated on 09/Dec/22 $$\int_{{R}} \frac{{t}^{\mathrm{2}} }{\left({t}^{\mathrm{2}} +{a}^{\mathrm{2}} \right)^{{n}+\mathrm{1}} }{dt}\:=?\:/\:\:{a}\neq{o}\:,\:{n}\epsilon{N}^{\ast} \\ $$ Answered by dre23 last updated on 10/Dec/22 $${t}=\mid{a}\mid{s}…
Question Number 116887 by ZiYangLee last updated on 07/Oct/20 $$\mathrm{Let}\:{k}=\mathrm{sin}\:\mathrm{1}°×\mathrm{sin}\:\mathrm{3}°×\mathrm{sin}\:\mathrm{5}°×\ldots×\mathrm{sin}\:\mathrm{89}° \\ $$$$\mathrm{Find}\:\mathrm{log}_{\mathrm{2}} {k}^{\mathrm{2}} . \\ $$ Commented by MJS_new last updated on 07/Oct/20 $$\mathrm{answer}\:\mathrm{is}\:−\mathrm{89} \\…
Question Number 116884 by zakirullah last updated on 07/Oct/20 Answered by Olaf last updated on 07/Oct/20 $$\mathrm{In}\:\mathrm{linear}\:\mathrm{algebra},\:\mathrm{a}\:\mathrm{matrix}\:\mathrm{is}\:\mathrm{said}\:\mathrm{to}\:\mathrm{be} \\ $$$$\mathrm{scaled}\:\mathrm{in}\:\mathrm{rows}\:\mathrm{if}\:\mathrm{the}\:\mathrm{number}\:\mathrm{of}\:\mathrm{zeros} \\ $$$$\mathrm{preceding}\:\mathrm{the}\:\mathrm{first}\:\mathrm{non}−\mathrm{zero}\:\mathrm{value}\:\mathrm{of} \\ $$$$\mathrm{a}\:\mathrm{row}\:\mathrm{increases}\:\mathrm{row}\:\mathrm{by}\:\mathrm{row}\:\mathrm{until} \\ $$$$\mathrm{ultimately}\:\mathrm{all}\:\mathrm{that}\:\mathrm{remains}\:\mathrm{are}\:\mathrm{zero}\::…
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Question Number 116847 by mohammad17 last updated on 07/Oct/20 Commented by mohammad17 last updated on 07/Oct/20 $${help}\:{me}\:{sir} \\ $$ Answered by TANMAY PANACEA last updated…
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Question Number 182369 by mathocean1 last updated on 08/Dec/22 $${Find}\:{radius}\:{and}\:{center}\:{of}\:\left({S}\right): \\ $$$$\left({S}\right):\begin{cases}{{x}+{y}+{z}=\mathrm{4}}\\{{y}^{\mathrm{2}} +{yz}+{z}^{\mathrm{2}} =\mathrm{4}\left({y}+{z}\right)}\end{cases} \\ $$ Commented by a.lgnaoui last updated on 09/Dec/22 $$\mathrm{y}+\mathrm{z}=\mathrm{4}−\mathrm{x}\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\left(\mathrm{1}\right) \\…