Question Number 73566 by Rio Michael last updated on 13/Nov/19 $${show}\:{that}\:{f}\left({x}\right)\:=\:\mid{x}\mid\:{is}\:{not}\:{differentiable}\:{at}\:{x}=\mathrm{0},\:{where}\:\mid{x}\mid \\ $$$${denotes}\:{he}\:{absolute}\:{value}\:{function} \\ $$ Commented by Rio Michael last updated on 13/Nov/19 $${thanks}\:{sir}, \\…
Question Number 8031 by Nayon last updated on 28/Sep/16 $$\:\:\:\:\:\:\:\:\:\:\:\:\:\sqrt{\mathrm{2}}\:\approx\frac{\mathrm{19601}}{\mathrm{13860}} \\ $$ Answered by prakash jain last updated on 28/Sep/16 $$\sqrt{\mathrm{2}}=\mathrm{1}+\frac{\mathrm{1}}{\mathrm{1}+\sqrt{\mathrm{2}}}\:\:\:\:…\left({i}\right) \\ $$$$\mathrm{putting}\:\mathrm{value}\:\mathrm{of}\:\sqrt{\mathrm{2}}\:\mathrm{from}\:\left({i}\right)\:\mathrm{in}\:\mathrm{RHS} \\ $$$$\mathrm{of}\:\left({i}\right)…
Question Number 73567 by Rio Michael last updated on 13/Nov/19 $${Determine}\:{the}\:{value}\:{of}\:{a}\:{and}\:{b}\:{fir}\:{which}\:{the}\:{function}\:{f},{defined}\:{by} \\ $$$${f}\left({x}\right)\:=\:\begin{cases}{−\mathrm{2}{sinx},\:\:{x}\:<\:−\frac{\pi}{\mathrm{2}}}\\{{asinx}\:+\:{b},−\frac{\pi}{\mathrm{2}}\:\leqslant\:{x}\:<\:\frac{\pi}{\mathrm{2}}}\\{{cosx},\:\:\:\:\:\:\:\:\:\:\:\:\:\:{x}\:>\:\frac{\pi}{\mathrm{2}}}\end{cases} \\ $$$${is}\:{continouos} \\ $$ Commented by Rio Michael last updated on 13/Nov/19…
Question Number 139103 by ajfour last updated on 22/Apr/21 $${x}^{\mathrm{3}} −{x}={c}\:\:\:;\:\:\mathrm{0}<{c}<\frac{\mathrm{2}}{\mathrm{3}\sqrt{\mathrm{3}}}\:.\:{Find}\:{x}. \\ $$ Commented by ajfour last updated on 24/Apr/21 Answered by mr W last…
Question Number 73565 by Rio Michael last updated on 13/Nov/19 $${investigate}\:{the}\:{continuity}\:{of}\:{f}\:,{given}\:{by} \\ $$$${f}:\:{x}\:\rightarrow\:\begin{cases}{\mathrm{1}−{x},\:{if}\:{x}<\mathrm{1}}\\{\mathrm{0},{if}\:{x}\:=\mathrm{1}}\\{{x}^{\mathrm{2}} −\mathrm{3}{x}\:+\:\mathrm{2},{if}\:{x}\:>\mathrm{1}}\end{cases} \\ $$$${at}\:{the}\:{point}\:{x}\:=\mathrm{1} \\ $$$$ \\ $$ Commented by Rio Michael last…
Question Number 8027 by Nayon last updated on 28/Sep/16 $${prove}\rightarrow\:{any}\:{prime}\:{number}>\mathrm{2}\: \\ $$$${can}\:{be}\:{written}\:{into}\left(\:{x}^{\mathrm{2}} −{y}^{\mathrm{2}\:} \right)\:{where} \\ $$$$\left({x},{y}\right)\in{N} \\ $$ Commented by FilupSmith last updated on 28/Sep/16…
Question Number 8026 by Nayon last updated on 28/Sep/16 $${Find}\:{the}\:{factor}\:{of}\:\left(\mathrm{3}^{\mathrm{200}} +\mathrm{4}\right) \\ $$ Answered by Rasheed Soomro last updated on 28/Sep/16 $$\mathrm{3}^{\mathrm{200}} +\mathrm{4} \\ $$$$=\left(\mathrm{3}^{\mathrm{100}}…
Question Number 73560 by mhmd last updated on 13/Nov/19 $${prove}\:{that}\:\left(\mathrm{1}−{itan}\theta\right)/\left({i}+{cot}\theta\right)={itan}\theta \\ $$$${pleas}\:{sir}\:{help}\:{me}? \\ $$ Commented by MJS last updated on 13/Nov/19 $$\mathrm{it}'\mathrm{s}\:\mathrm{not}\:\mathrm{generally}\:\mathrm{true} \\ $$$$\frac{\mathrm{1}−\mathrm{i}\:\mathrm{tan}\:\theta}{\mathrm{i}+\mathrm{cot}\:\theta}=\mathrm{2sin}\:\theta\:\mathrm{cos}\:\theta\:−\mathrm{tan}\:\theta\:−\mathrm{2i}\:\mathrm{sin}^{\mathrm{2}} \:\theta…
Question Number 8025 by Nayon last updated on 28/Sep/16 $${find}\:{factor}\:{of}\:\gg \\ $$$$\:\:\:\:\:\:\:\:\:\left(\mathrm{2}^{\mathrm{4}{n}+\mathrm{2}} +\mathrm{1}\right) \\ $$$${at}\:{the}\:{same}\:{way}\:{expand}\:\mathrm{2}^{\mathrm{58}} +\mathrm{1} \\ $$$$ \\ $$ Commented by Rasheed Soomro last…
Question Number 73561 by Rio Michael last updated on 13/Nov/19 $${find}\:{the}\:{value}\:{of}\:\lambda\:{for}\:{which} \\ $$$$\:{f}\::\:{x}\:\rightarrow\:\begin{cases}{\mathrm{2}\lambda\:−\:{x},\:{if}\:{x}\:<\:\mathrm{1}}\\{\lambda^{\mathrm{2}} \:+\:{x}\:−\mathrm{1},\:{if}\:{x}\:>\:\mathrm{1}}\end{cases} \\ $$$${has}\:{a}\:{limit}\:{as}\:{x}\rightarrow\:\mathrm{1} \\ $$ Answered by ajfour last updated on 13/Nov/19…