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Category: Differential Equation

Question-57571

Question Number 57571 by cesar.marval.larez@gmail.com last updated on 07/Apr/19 Commented by MJS last updated on 07/Apr/19 $$\mathrm{what}\:\mathrm{is}\:“\mathrm{sen}''? \\ $$$$\mathrm{if}\:\mathrm{it}'\mathrm{s}\:\mathrm{sinus}\:\mathrm{or}\:\mathrm{secans}\:\mathrm{we}\:\mathrm{cannot}\:\mathrm{solve}\:\mathrm{it}\: \\ $$ Terms of Service Privacy…

Question-187858

Question Number 187858 by normans last updated on 23/Feb/23 Answered by som(math1967) last updated on 23/Feb/23 $$\frac{\mathrm{1}}{{a}}+\frac{\mathrm{1}}{{b}}+\frac{\mathrm{1}}{{c}}=\frac{\mathrm{1}}{{a}+{b}+{c}} \\ $$$$\Rightarrow\left({a}+{b}+{c}\right)\left({ab}+{bc}+{ca}\right)−{abc}=\mathrm{0} \\ $$$$\Rightarrow{a}^{\mathrm{2}} {b}+{abc}+{a}^{\mathrm{2}} {c}+{ab}^{\mathrm{2}} +{b}^{\mathrm{2}} {c}+{abc}+\cancel{{abc}}…

dy-dx-y-4y-3-3y-2-x-with-y-1-1-

Question Number 122281 by benjo_mathlover last updated on 15/Nov/20 $$\:\:\frac{{dy}}{{dx}}\:=\:\frac{−{y}}{\mathrm{4}{y}^{\mathrm{3}} +\mathrm{3}{y}^{\mathrm{2}} +{x}}\:{with}\:{y}\left(\mathrm{1}\right)=−\mathrm{1} \\ $$ Answered by liberty last updated on 15/Nov/20 $$\left(\mathrm{4y}^{\mathrm{3}} +\mathrm{3y}^{\mathrm{2}} +\mathrm{x}\right)\mathrm{dy}\:+\:\mathrm{ydx}\:=\:\mathrm{0} \\…