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Question Number 146353 Answers: 0 Comments: 0
Question Number 146532 Answers: 2 Comments: 0
$$\mathrm{2}^{\boldsymbol{{x}}} \:=\:\mathrm{5}\:\:,\:\:\mathrm{3}^{\boldsymbol{{y}}} \:=\:\mathrm{9}\:\:{and}\:\:\mathrm{25}^{\boldsymbol{{z}}} \:=\:\mathrm{8} \\ $$$${find}\:\:\:\left({x}\centerdot{y}\centerdot{z}\right)=? \\ $$
Question Number 146334 Answers: 5 Comments: 1
Question Number 146328 Answers: 1 Comments: 0
Question Number 146325 Answers: 1 Comments: 0
$${Given}\:{that}\:\left({a}+{b}\right)=\sqrt{\mathrm{3}\sqrt{\mathrm{3}}−\sqrt{\mathrm{2}}} \\ $$$${and}\:\left({a}−{b}\right)=\sqrt{\mathrm{3}\sqrt{\mathrm{2}}−\sqrt{\mathrm{3}}} \\ $$$${Find} \\ $$$$\left({i}\right)\:{ab}\:\:\:\:\:\:\left({ii}\right)\:{a}^{\mathrm{2}} +{b}^{\mathrm{2}} \\ $$
Question Number 146315 Answers: 1 Comments: 0
Question Number 147334 Answers: 1 Comments: 1
$$\mathrm{If}\:\:\:\:\mathrm{log}_{\mathrm{6}} \mathrm{30}\:\:\:=\:\:\:\mathrm{a},\:\:\:\:\:\:\:\:\:\mathrm{log}_{\mathrm{15}} \mathrm{24}\:\:\:=\:\:\:\mathrm{b},\:\:\:\:\:\:\:\:\:\:\:\mathrm{evaluate}:\:\:\:\mathrm{log}_{\mathrm{12}} \mathrm{60} \\ $$
Question Number 146311 Answers: 0 Comments: 3
$${lg}^{\mathrm{2}} \left(\mathrm{10}{x}\right)\:+\:{lg}\left({x}\right)\:+\:\mathrm{1}\:=\:\mathrm{6}\:-\:{lg}\left({x}\right) \\ $$$$\Rightarrow\:{x}=? \\ $$
Question Number 146310 Answers: 1 Comments: 3
$$\mathrm{4}\:{sin}\left({x}\right)\:{cos}\left({x}\right)\:\geqslant\:\sqrt{\mathrm{3}} \\ $$
Question Number 146307 Answers: 1 Comments: 0
$$ \\ $$$$\:\:\:\:\:\:\:\mathrm{S}_{{n}} \:=\underset{{k}=\mathrm{1}} {\overset{{n}} {\sum}}\frac{\:\mathrm{1}}{\left.{k}\:\left({k}+\mathrm{2}\right){k}+\mathrm{4}\right)} \\ $$$$\:\:\:\:\:\:\:\:{lim}_{\:{n}\rightarrow\infty} \:\left(\:\:\mathrm{S}_{\:{n}} \:\right)\:=\:? \\ $$
Question Number 146303 Answers: 2 Comments: 4
Question Number 146300 Answers: 1 Comments: 0
Question Number 146290 Answers: 0 Comments: 5
Question Number 146285 Answers: 3 Comments: 2
$$\int\:{sin}\left(\mathrm{2}{x}\:-\:\frac{\pi}{\mathrm{4}}\right)\:{dx}\:=\:? \\ $$
Question Number 146277 Answers: 1 Comments: 0
$$\int{cos}\left(\mathrm{2}{x}\right){dx}=? \\ $$
Question Number 146272 Answers: 1 Comments: 3
$${log}_{\boldsymbol{{x}}} \left({x}^{\mathrm{2}} \:+\:\mathrm{1}\right)\:\leqslant\:\mathrm{1} \\ $$
Question Number 146318 Answers: 1 Comments: 4
$${if}\:\:\:{arg}\:\left(\frac{{z}−{i}}{{i}}\right)=\mathrm{2} \\ $$$${find}\:\:\:{Imz}\:+\:{Rez}\:=\:? \\ $$
Question Number 146317 Answers: 0 Comments: 0
Question Number 146316 Answers: 2 Comments: 0
Question Number 146263 Answers: 2 Comments: 0
$$\:\:\underset{{x}\rightarrow−\infty} {\mathrm{lim}}\left(−\mathrm{2}{x}+\mathrm{1}−\sqrt{\mathrm{4}{x}^{\mathrm{2}} −\mathrm{5}{x}+\mathrm{8}}\right)=? \\ $$
Question Number 146261 Answers: 1 Comments: 0
$$\mathrm{4}\:{cos}\:\left(\mathrm{50}°\right)\:-\:\frac{\mathrm{1}}{{sin}\:\left(\mathrm{20}°\right)}\:=\:? \\ $$
Question Number 146260 Answers: 1 Comments: 0
$$\mathrm{solve}\:\mathrm{y}^{''} −\mathrm{2y}^{'} \:+\mathrm{y}\:=\mathrm{e}^{−\mathrm{x}} \mathrm{sinx} \\ $$
Question Number 146253 Answers: 2 Comments: 0
$$\left(\mathrm{4}{x}^{\mathrm{4}} \:-\:\mathrm{2}{x}^{\mathrm{2}} \:+\:\mathrm{17}\right)_{\boldsymbol{{max}}} \:=\:? \\ $$
Question Number 146250 Answers: 0 Comments: 1
$${I}_{{k}} =\underset{\mathrm{0}} {\overset{{k}\Pi} {\int}}{e}^{{x}^{\mathrm{2}} } \mathrm{sin}\:{x}\:{dx}\:{then}\:{find}\:{relation}\: \\ $$$${between}\:{I}_{\mathrm{1}} ,{I}_{\mathrm{2}} ,{I}_{\mathrm{3}} \\ $$
Question Number 146366 Answers: 1 Comments: 0
Question Number 146365 Answers: 0 Comments: 0
$$\mathrm{calculate}\:\int_{\mathrm{0}} ^{\infty} \:\frac{\mathrm{arctan}\left(\mathrm{x}^{\mathrm{2}} \right)}{\mathrm{x}^{\mathrm{2}} \:+\mathrm{4}}\mathrm{dx} \\ $$
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