Question Number 38812 by MrW3 last updated on 30/Jun/18 $${Can}\:{you}\:{remember}\:{this}\:{formula}\:{and} \\ $$$${the}\:{question}\:{behind}\:{it}? \\ $$$$\:\:\:\:\boldsymbol{\Phi}=\boldsymbol{{mn}}−\underset{\boldsymbol{{i}}=\mathrm{1}} {\overset{\boldsymbol{{m}}} {\boldsymbol{\sum}}}\:\underset{\boldsymbol{{j}}=\mathrm{1}} {\overset{\boldsymbol{{n}}} {\boldsymbol{\sum}}}\:\boldsymbol{{sign}}\left[\boldsymbol{{gcd}}\left(\boldsymbol{{i}},\boldsymbol{{j}}\right)−\mathrm{1}\right] \\ $$$${The}\:{first}\:{prize}\:{goes}\:{to}\:{that}\:{one}\:{who} \\ $$$${can}\:{tell}\:{the}\:#\:{of}\:{the}\:{initial}\:{question}. \\ $$ Commented…
Question Number 169870 by MathsFan last updated on 11/May/22 $$ \\ $$In an artistic design by a contractor of the students’ centre in a university,…
Question Number 169874 by sciencestudent last updated on 11/May/22 $$\underset{{d}\mid\mathrm{6}} {\sum}{d}=? \\ $$ Answered by alephzero last updated on 11/May/22 $$\underset{{d}\mid\mathrm{6}} {\sum}{d}\:= \\ $$$$\left[\mathrm{1}\mid\mathrm{6}\:\wedge\:\mathrm{2}\mid\mathrm{6}\:\wedge\:\mathrm{3}\mid\mathrm{6}\:\wedge\:\mathrm{6}\mid\mathrm{6}\right] \\…
Question Number 169863 by SANOGO last updated on 11/May/22 $$\int_{{o}} ^{\mathrm{1}} {xln}\mid{x}^{\mathrm{2}} −\mathrm{2}{x}\mid{dx} \\ $$ Answered by Mathspace last updated on 11/May/22 $${x}^{\mathrm{2}} −\mathrm{2}{x}={x}\left({x}−\mathrm{2}\right)<\mathrm{0}\:{sur}\:\left[\mathrm{01}\right]\:\Rightarrow \\…
Question Number 169850 by henderson last updated on 10/May/22 Commented by henderson last updated on 13/May/22 $$\boldsymbol{\mathrm{no}}\:\boldsymbol{\mathrm{answer}}\:\boldsymbol{\mathrm{for}}\:\boldsymbol{\mathrm{this}}\:\boldsymbol{\mathrm{exercise}}\:? \\ $$ Terms of Service Privacy Policy Contact:…
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Question Number 38765 by Tinku Tara last updated on 29/Jun/18 $$\mathrm{App}\:\mathrm{notification}\:\mathrm{problem}\:\mathrm{has} \\ $$$$\mathrm{been}\:\mathrm{fixed}.\:\mathrm{Please}\:\mathrm{report}\:\mathrm{if}\:\mathrm{u}\:\mathrm{are} \\ $$$$\mathrm{still}\:\mathrm{not}\:\mathrm{able}\:\mathrm{to}\:\mathrm{get}\:\mathrm{notification}. \\ $$$$ \\ $$$$\mathrm{Issue}\:\mathrm{was}\:\mathrm{on}\:\mathrm{server}\:\mathrm{side}\:\mathrm{so}\:\mathrm{no}\:\mathrm{app} \\ $$$$\mathrm{updates}\:\mathrm{are}\:\mathrm{needed}. \\ $$ Commented by…
Question Number 38759 by velmurugan last updated on 29/Jun/18 $$\mathrm{3}+\mathrm{3}= \\ $$ Commented by Rio Mike last updated on 29/Jun/18 $${ofcourse}\:\mathrm{6}. \\ $$ Commented by…
Question Number 38743 by kunal1234523 last updated on 29/Jun/18 $$\mathrm{If}\:\mathrm{sin}\:\theta\:+\:{sin}\:\phi\:=\:{a}\:\mathrm{and}\:\mathrm{cos}\:\theta\:+\:\mathrm{cos}\:\phi\:=\:{b},\: \\ $$$$\mathrm{find}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\:\mathrm{tan}\:\frac{\theta−\phi}{\mathrm{2}}\left({in}\:{terms}\:{of}\:{a}\:{and}\:{b}\right). \\ $$ Answered by math1967 last updated on 29/Jun/18 $$\mathrm{sin}\:\theta+\mathrm{sin}\:\phi={a} \\ $$$$\mathrm{2sin}\:\frac{\theta+\phi}{\mathrm{2}}\mathrm{cos}\:\frac{\theta−\phi}{\mathrm{2}}={a} \\…
Question Number 38741 by jasno91 last updated on 29/Jun/18 $$\mathrm{7}.\mathrm{2}+\left[\mathrm{0}.\mathrm{2}\:{of}\:\mathrm{10}−\left\{\mathrm{0}.\mathrm{6}+\mathrm{0}.\mathrm{3}−\mathrm{0}.\mathrm{8}−\mathrm{0}.\mathrm{6}\right\}\right] \\ $$ Commented by MrW3 last updated on 29/Jun/18 $$=\mathrm{7}.\mathrm{2}+\left[\mathrm{2}−\left\{\mathrm{0}.\mathrm{3}−\mathrm{0}.\mathrm{8}\right\}\right] \\ $$$$=\mathrm{7}.\mathrm{2}+\left[\mathrm{2}+\mathrm{0}.\mathrm{5}\right] \\ $$$$=\mathrm{7}.\mathrm{2}+\mathrm{2}.\mathrm{5} \\…