Category: Algebra

Question Number 11768 by Nayon last updated on 31/Mar/17 $${ax}^3+{bx}^2+cx+d=0solveit.$$ Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 11766 by uni last updated on 31/Mar/17 $$\int \frac{1}{\sin 2\mathrm{x}}\mathrm{dx}=?$$ Answered by ajfour last updated on 31/Mar/17 $$\int \frac{dx}{2\sin x\cos x}=\frac{1}{2}\int \frac{\sec {}^{2}x}{\tan x}dx$$$$=\frac{1}{2}\ln \mid \tan x\mid +C$$…

Question Number 11754 by Joel576 last updated on 31/Mar/17 $$\mathrm{How}\mathrm{many}\mathrm{numbers}\mathrm{between}1-2017$$$$\mathrm{that}{\mathrm{aren}}^{\prime }\mathrm{t}\mathrm{divisible}\mathrm{by}5,6,7,8?$$ Answered by mrW1 last updated on 31/Mar/17 $$leta=countofnumberswhicharemultipleof5$$$${let}\:{b}={count}\:{of}\:{numbers}\:{which}\:{are}\:{multiple}\:{of}\:\mathrm{6} \…

Question Number 142822 by aupo14 last updated on 05/Jun/21 Answered by MJS_new last updated on 06/Jun/21 $$x^2=i+x\Rightarrow x=\frac{1+\sqrt{1+4\mathrm{i}}}{2}=\frac{2+\sqrt{2(1+\sqrt{17})}}{4}+\frac{\sqrt{2(-1+\sqrt{17})}}{4}\mathrm{i}$$$$\mathrm{the}\mathrm{other}\mathrm{solution}{\mathrm{doesn}}^{\prime }\mathrm{t}\mathrm{fit}\left(\mathrm{just}\mathrm{give}\mathrm{it}\mathrm{a}\mathrm{try}\right)$$ Terms of Service…

Question Number 11741 by uni last updated on 30/Mar/17 $$\int {\mathrm{xtan}}^2\mathrm{x}\mathrm{dx}=?$$ Answered by mrW1 last updated on 30/Mar/17 $$\int{x}\mathrm{tan}^{\mathrm{2}} \:{x}\:{dx}=\int\mathrm{tan}^{\mathrm{2}} \:{x}\:{d}\left(\frac{{x}^{\mathrm{2}} }{\mathrm{2}}\right) \…