Question Number 72441 by kouidri last updated on 28/Oct/19 $$\mathrm{If}\:^{{n}} {C}_{\mathrm{12}} =\:^{{n}} {C}_{\mathrm{8}} \:,\:\mathrm{then}\:{n}= \\ $$ Commented by mathmax by abdo last updated on 29/Oct/19…
Question Number 72122 by psyche last updated on 24/Oct/19 $$\mathrm{If}\:\:{p}\:\:\mathrm{is}\:\mathrm{the}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{a}\:\mathrm{man}\:{x}\:\mathrm{will} \\ $$$$\mathrm{die}\:\mathrm{in}\:\mathrm{a}\:\mathrm{year},\:\mathrm{then}\:\mathrm{the}\:\mathrm{probability}\:\mathrm{that} \\ $$$$\mathrm{out}\:\mathrm{of}\:{n}\:\mathrm{men}\:{A}_{\mathrm{1}} ,\:{A}_{\mathrm{2}} ,\:…,\:{A}_{{n}} \:\:\mathrm{each}\:\mathrm{aged}\:{x}, \\ $$$${A}_{\mathrm{1}} \:\mathrm{will}\:\mathrm{die}\:\mathrm{in}\:\mathrm{a}\:\mathrm{year}\:\mathrm{and}\:\mathrm{be}\:\mathrm{first}\:\mathrm{to}\:\mathrm{die}, \\ $$$$\mathrm{is} \\ $$ Terms…
Question Number 6519 by benny last updated on 30/Jun/16 $$\:\underset{\:\mathrm{0}} {\overset{{a}} {\int}}\:\:\:\frac{\mathrm{1}}{{x}+\sqrt{{a}^{\mathrm{2}} −{x}^{\mathrm{2}} }}\:{dx}\:= \\ $$ Commented by Tawakalitu. last updated on 30/Jun/16 $$\frac{\Pi}{\mathrm{4}} \\…
Question Number 6043 by shaikreshma last updated on 10/Jun/16 $$\mathrm{The}\:\mathrm{number}\:\mathrm{of}\:\mathrm{positive}\:\mathrm{integral}\:\mathrm{pairs} \\ $$$$\mathrm{satisfying}\:\mathrm{the}\:\mathrm{equation} \\ $$$$\mathrm{tan}^{−\mathrm{1}} {a}\:+\:\mathrm{tan}^{−\mathrm{1}} {b}\:=\:\mathrm{tan}^{−\mathrm{1}} \mathrm{3}\:\:\mathrm{is} \\ $$ Answered by Yozzii last updated on…
Question Number 5937 by Master Tria last updated on 05/Jun/16 $$\mathrm{If}\:\mathrm{the}\:\mathrm{equation}\:{x}^{\mathrm{4}} −\mathrm{4}{x}^{\mathrm{3}} +{ax}^{\mathrm{2}} +{bx}+\mathrm{1}=\mathrm{0} \\ $$$$\:\mathrm{has}\:\mathrm{four}\:\mathrm{positive}\:\mathrm{roots},\:\mathrm{then}\:{a},\:{b}\:\mathrm{are} \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 5936 by Master Tria last updated on 05/Jun/16 $$\mathrm{If}\:\mathrm{the}\:\mathrm{equation}\:{x}^{\mathrm{4}} −\mathrm{4}{x}^{\mathrm{3}} +{ax}^{\mathrm{2}} +{bx}+\mathrm{1}=\mathrm{0} \\ $$$$\:\mathrm{has}\:\mathrm{four}\:\mathrm{positive}\:\mathrm{roots},\:\mathrm{then}\:{a},\:{b}\:\mathrm{are} \\ $$ Answered by Yozzii last updated on 06/Jun/16…
Question Number 5935 by Master Tria last updated on 05/Jun/16 $$\mathrm{If}\:{a},\:{b},\:{c},\:{x},\:{y},\:{z}\:\in\:{R}\:\mathrm{be}\:\mathrm{such}\:\mathrm{that}\: \\ $$$$\left({a}+{b}+{c}\right)^{\mathrm{2}} =\mathrm{3}\left({ab}+{bc}+{ca}−{x}^{\mathrm{2}} −{y}^{\mathrm{2}} −{z}^{\mathrm{2}} \right), \\ $$$$\mathrm{then} \\ $$ Commented by prakash jain…
Question Number 5917 by Summaira last updated on 05/Jun/16 $$\mathrm{If}\:\begin{vmatrix}{{x}+{a}}&{\:\:\:{b}}&{\:\:\:{c}}\\{\:\:\:{a}}&{{x}+{b}}&{\:\:\:{c}}\\{\:\:\:{a}}&{\:\:\:{b}}&{{x}+{c}}\end{vmatrix}=\:\mathrm{0},\:\mathrm{then}\:{x}\:\mathrm{equals} \\ $$ Answered by sanusihammed last updated on 05/Jun/16 Terms of Service Privacy Policy Contact:…
Question Number 136901 by nadovic last updated on 27/Mar/21 $${A}\:{gold}\:{ore}\:{is}\:{found}\:{to}\:{have}\:{a}\:{purity} \\ $$$${of}\:\mathrm{70}{ppm}.\:{How}\:{much}\:{gold}\:{in}\:{grams} \\ $$$${can}\:{be}\:{recovered}\:{from}\:\mathrm{5}{kg}\:{of}\:{the}\:{ore}? \\ $$ Answered by Olaf last updated on 27/Mar/21 $${m}_{{pure}\:{gold}} \:=\:\tau{m}_{{ore}}…
Question Number 5824 by Bc160200609 last updated on 30/May/16 $$\mathrm{The}\:\mathrm{exponent}\:\mathrm{of}\:\:\mathrm{12}\:\mathrm{in}\:\:\mathrm{100}!\:\:\mathrm{is}\: \\ $$ Commented by Yozzii last updated on 30/May/16 $$\mathrm{12}^{\mathrm{48}} =\mathrm{2}^{\mathrm{96}} \mathrm{3}^{\mathrm{48}} \:{but}\:{I}\:{haven}'{t}\:{figured} \\ $$$${out}\:{yet}\:{how}\:{to}\:{show}\:{this}.…