Question Number 141909 by mathdanisur last updated on 24/May/21 Commented by mr W last updated on 24/May/21 $${BC}=\frac{\mathrm{5}}{\mathrm{2}} \\ $$ Answered by mr W last…
Question Number 76340 by Master last updated on 26/Dec/19 Commented by behi83417@gmail.com last updated on 26/Dec/19 $$\mathrm{x}=−\mathrm{1},\mathrm{0} \\ $$ Answered by behi83417@gmail.com last updated on…
Question Number 10794 by j.masanja06@gmail.com last updated on 25/Feb/17 $$\mathrm{find}\:\mathrm{the}\:\mathrm{range}\:\mathrm{or}\left(\mathrm{ranges}\right)\:\mathrm{of}\:\mathrm{the}\:\mathrm{value} \\ $$$$\mathrm{x}\:\mathrm{can}\:\mathrm{take}\:\mathrm{for}\:\mathrm{x}+\mathrm{6}>\mid\mathrm{2x}+\mathrm{3}\mid \\ $$ Commented by sandy_suhendra last updated on 25/Feb/17 $$\mathrm{this}\:\mathrm{question}\:\mathrm{has}\:\mathrm{been}\:\mathrm{answered}\:\mathrm{by}\:\mathrm{mrW1} \\ $$$$\mathrm{and}\:\mathrm{lee}\:\left(\mathrm{look}\:\mathrm{for}\:\mathrm{question}\:\mathrm{no}\:\mathrm{10777}\right) \\…
Question Number 10795 by j.masanja06@gmail.com last updated on 25/Feb/17 $$\mathrm{by}\:\mathrm{use}\:\mathrm{sketching}\:\mathrm{determine}\:\mathrm{the}\:\mathrm{range} \\ $$$$\mathrm{or}\left(\mathrm{ranges}\right)\:\mathrm{of}\:\mathrm{the}\:\mathrm{value}\:\mathrm{x}\:\mathrm{can}\:\mathrm{take}\:\mathrm{for} \\ $$$$\mathrm{each}\:\mathrm{of}\:\mathrm{the}\:\mathrm{following}\:\mathrm{inqualities} \\ $$$$\left(\mathrm{i}\right)\:\mathrm{3x}^{\mathrm{2}} −\mathrm{19x}−\mathrm{6}\leqslant\mathrm{0} \\ $$$$\left(\mathrm{ii}\right)\mathrm{2x}^{\mathrm{2}} −\mathrm{5x}−\mathrm{3}\geqslant\mathrm{0} \\ $$ Commented by sandy_suhendra…
Question Number 10793 by j.masanja06@gmail.com last updated on 25/Feb/17 $$\mathrm{let}\:\:\mathrm{A}\:=\begin{vmatrix}{\mathrm{4}}&{\mathrm{4k}}&{\mathrm{k}}\\{\mathrm{0}}&{\mathrm{k}}&{\mathrm{4k}}\\{\mathrm{0}}&{\mathrm{0}}&{\mathrm{4}}\end{vmatrix}\:\mathrm{if}\:\mathrm{det}\left(\mathrm{A}^{\mathrm{2}} \right)=\mathrm{16} \\ $$$$\mathrm{then}\:\mid\mathrm{k}\mid\:\mathrm{is}? \\ $$ Answered by sandy_suhendra last updated on 25/Feb/17 $$\mathrm{det}\:\mathrm{A}=\mathrm{16k}+\mathrm{0}+\mathrm{0}−\left(\mathrm{0}+\mathrm{0}+\mathrm{0}\right)=\mathrm{16k} \\ $$$$\mathrm{det}\left(\mathrm{A}^{\mathrm{2}}…
Question Number 10789 by niraj last updated on 25/Feb/17 $$\left(\mathrm{2}+\mathrm{3}{i}\right){x}^{\mathrm{2}} −\left(\mathrm{3}−\mathrm{2}{i}\right){y}=\mathrm{2}{x}−\mathrm{3}{y}+\mathrm{5}{i} \\ $$ Answered by sandy_suhendra last updated on 25/Feb/17 $$\left(\mathrm{2}+\mathrm{3i}\right)\mathrm{x}^{\mathrm{2}} −\mathrm{3y}+\mathrm{2iy}=\mathrm{2x}−\mathrm{3y}+\mathrm{5i} \\ $$$$\Rightarrow\:\left(\mathrm{2}+\mathrm{3i}\right)\mathrm{x}^{\mathrm{2}} =\mathrm{2x}…
Question Number 10774 by j.masanja06@gmail.com last updated on 24/Feb/17 Answered by sandy_suhendra last updated on 24/Feb/17 $$=\begin{vmatrix}{\mathrm{log}_{\mathrm{3}} \mathrm{1024}\:\:\:\:\mathrm{1}}\\{\mathrm{log}_{\mathrm{3}} \mathrm{8}\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{2}}\end{vmatrix}×\begin{vmatrix}{\mathrm{log}_{\mathrm{2}} \mathrm{3}\:\:\:\:\mathrm{log}_{\mathrm{4}} \mathrm{3}}\\{\mathrm{log}_{\mathrm{3}} \mathrm{4}\:\:\:\:\mathrm{log}_{\mathrm{3}} \mathrm{4}}\end{vmatrix} \\ $$$$=\left(\mathrm{2log}_{\mathrm{3}}…
Question Number 10776 by j.masanja06@gmail.com last updated on 24/Feb/17 $$\mathrm{if}\:\:\:\mathrm{D}\:=\begin{vmatrix}{\mathrm{1}}&{\mathrm{3sin}\theta}&{\mathrm{1}}\\{\mathrm{sin}\theta}&{\mathrm{1}}&{\mathrm{3cos}\theta}\\{\mathrm{1}}&{\mathrm{sin}\theta}&{\mathrm{1}}\end{vmatrix}\:\mathrm{the}\:\mathrm{maxi} \\ $$$$\mathrm{mum}\:\mathrm{value}\:\mathrm{of}\:\mathrm{D}\:\mathrm{is}? \\ $$ Answered by sandy_suhendra last updated on 24/Feb/17 $$\mathrm{D}=\mathrm{1}+\mathrm{9}\:\mathrm{sin}\theta\:\mathrm{cos}\theta+\mathrm{sin}\theta\:\mathrm{cos}\theta−\left(\mathrm{1}+\mathrm{3}\:\mathrm{sin}\theta\:\mathrm{cos}\theta+\mathrm{3}\:\mathrm{sin}\theta\:\mathrm{cos}\theta\right)\:\:\:\:\: \\ $$$$\:\:\:\:=\mathrm{4}\:\mathrm{sin}\theta\:\mathrm{cos}\theta=\mathrm{2}\:\mathrm{sin}\:\mathrm{2}\theta \\…
Question Number 10777 by j.masanja06@gmail.com last updated on 24/Feb/17 $$\:\mathrm{find}\:\mathrm{the}\:\mathrm{range}\:\mathrm{or}\:\left(\mathrm{ranges}\right)\:\mathrm{of}\:\mathrm{value}\:\mathrm{x} \\ $$$$\mathrm{can}\:\mathrm{take}\:\mathrm{for}\:\:\mathrm{x}+\mathrm{6}>\left[\mathrm{2x}+\mathrm{3}\right] \\ $$ Commented by mrW1 last updated on 24/Feb/17 $${do}\:{you}\:{mean}\:{x}+\mathrm{6}>\mid\mathrm{2}{x}+\mathrm{3}\mid\:? \\ $$ Commented…
Question Number 141846 by ArielVyny last updated on 24/May/21 $$\sum_{{k}\geqslant\mathrm{0}} \left({C}_{{n}} ^{{k}} \right)^{\mathrm{2}} \\ $$ Answered by mindispower last updated on 24/May/21 $$\underset{{k}\geqslant\mathrm{0}} {\sum}{C}_{{n}} ^{{k}}…