Question Number 139697 by otchereabdullai@gmail.com last updated on 30/Apr/21 $$\mathrm{In}\:\mathrm{an}\:\mathrm{entrance}\:\mathrm{examination}\:\mathrm{each}\: \\ $$$$\mathrm{question}\:\mathrm{has}\:\mathrm{four}\:\mathrm{possible}\:\mathrm{answers}. \\ $$$$\mathrm{A}\:\mathrm{candidate}\:\mathrm{answers}\:\mathrm{three}\:\mathrm{question} \\ $$$$\mathrm{by}\:\mathrm{guessing}\:. \\ $$$$\mathrm{a}.\:\mathrm{find}\:\mathrm{the}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{all}\:\mathrm{three}\: \\ $$$$\mathrm{questions}\:\mathrm{are}\:\mathrm{wrong}. \\ $$$$\mathrm{b}.\:\mathrm{find}\:\mathrm{the}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{all}\:\mathrm{the}\: \\ $$$$\mathrm{questions}\:\mathrm{are}\:\mathrm{correct}. \\…
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Question Number 139690 by hawa last updated on 30/Apr/21 $$\mathrm{2}{x}=\mathrm{4}{x}\:{find}\:{x} \\ $$ Commented by Rasheed.Sindhi last updated on 30/Apr/21 $$\mathrm{4}{x}−\mathrm{2}{x}=\mathrm{0} \\ $$$$\mathrm{2}{x}=\mathrm{0} \\ $$$${x}=\mathrm{0}/\mathrm{2}=\mathrm{0} \\…
Question Number 8600 by Chantria last updated on 17/Oct/16 $$\:\boldsymbol{{Test}}\: \\ $$$$\:\mathrm{1}=\sqrt{\mathrm{1}}=\sqrt{\left(−\mathrm{1}\right)\left(−\mathrm{1}\right)}=\sqrt{−\mathrm{1}}\centerdot\sqrt{−\mathrm{1}} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:={i}\centerdot{i}={i}^{\mathrm{2}} =−\mathrm{1} \\ $$$$\:\:{so}\:\mathrm{1}=−\mathrm{1} \\ $$$$\:{Find}\:{the}\:{error}. \\ $$ Commented by prakash jain…
Question Number 139670 by EdwardNguithi last updated on 30/Apr/21 Terms of Service Privacy Policy Contact: info@tinkutara.com
Question Number 74123 by liki last updated on 19/Nov/19 Commented by liki last updated on 19/Nov/19 $$…{i}\:{need}\:{help}\:{roman}\:\left({iii}\right)\:{plz}.. \\ $$ Commented by liki last updated on…
Question Number 139656 by mohammad17 last updated on 30/Apr/21 $${if}\:\:^{\mathrm{4}} \mathrm{2}=\mathrm{2}^{{x}} \:\:{find}\:{x} \\ $$ Commented by mr W last updated on 30/Apr/21 $${what}\:{is}\:^{\mathrm{4}} \mathrm{2}? \\…
Question Number 139654 by otchereabdullai@gmail.com last updated on 30/Apr/21 Commented by mr W last updated on 30/Apr/21 $${too}\:{less}\:{information}\:{to}\:{find}\:{x}! \\ $$$${you}\:{should}\:{give}\:{e}.{g}.\:{AC}\:{or}\:{DC}. \\ $$ Commented by mr…
Question Number 139655 by mohammad17 last updated on 30/Apr/21 Answered by qaz last updated on 30/Apr/21 $$\int_{\mathrm{0}} ^{\mathrm{1}} {x}\mathrm{tan}^{−\mathrm{1}} \left({x}\right){ln}\left({x}^{\mathrm{2}} +\mathrm{1}\right){dx} \\ $$$$=\frac{\mathrm{1}}{\mathrm{2}}\int_{\mathrm{0}} ^{\mathrm{1}} \mathrm{tan}^{−\mathrm{1}}…
Question Number 139645 by otchereabdullai@gmail.com last updated on 30/Apr/21 Commented by mr W last updated on 30/Apr/21 $${OD}={AO}×\mathrm{sin}\:\angle{OAB}=\mathrm{52}×\frac{\mathrm{5}}{\mathrm{13}}=\mathrm{20} \\ $$$${BD}=\sqrt{\mathrm{25}^{\mathrm{2}} −\mathrm{20}^{\mathrm{2}} }=\mathrm{15} \\ $$$${BC}=\mathrm{2}×{BD}=\mathrm{2}×\mathrm{15}=\mathrm{30} \\…