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A-ball-is-bouncing-elastically-with-a-speed-1-m-s-between-walls-of-a-railway-compartment-of-size-10-m-in-a-direction-perpendicular-to-walls-The-train-is-moving-at-a-constant-velocity-of-10-m-s-parall

Question Number 21112 by Tinkutara last updated on 13/Sep/17 $$\mathrm{A}\:\mathrm{ball}\:\mathrm{is}\:\mathrm{bouncing}\:\mathrm{elastically}\:\mathrm{with}\:\mathrm{a} \\ $$$$\mathrm{speed}\:\mathrm{1}\:\mathrm{m}/\mathrm{s}\:\mathrm{between}\:\mathrm{walls}\:\mathrm{of}\:\mathrm{a}\:\mathrm{railway} \\ $$$$\mathrm{compartment}\:\mathrm{of}\:\mathrm{size}\:\mathrm{10}\:\mathrm{m}\:\mathrm{in}\:\mathrm{a}\:\mathrm{direction} \\ $$$$\mathrm{perpendicular}\:\mathrm{to}\:\mathrm{walls}.\:\mathrm{The}\:\mathrm{train}\:\mathrm{is} \\ $$$$\mathrm{moving}\:\mathrm{at}\:\mathrm{a}\:\mathrm{constant}\:\mathrm{velocity}\:\mathrm{of}\:\mathrm{10}\:\mathrm{m}/\mathrm{s} \\ $$$$\mathrm{parallel}\:\mathrm{to}\:\mathrm{the}\:\mathrm{direction}\:\mathrm{of}\:\mathrm{motion}\:\mathrm{of} \\ $$$$\mathrm{the}\:\mathrm{ball}.\:\mathrm{As}\:\mathrm{seen}\:\mathrm{from}\:\mathrm{the}\:\mathrm{ground} \\ $$$$\left({a}\right)\:\mathrm{the}\:\mathrm{direction}\:\mathrm{of}\:\mathrm{motion}\:\mathrm{of}\:\mathrm{the}\:\mathrm{ball} \\…

STATEMENT-1-The-locus-of-z-if-arg-z-1-z-1-pi-2-is-a-circle-and-STATEMENT-2-z-2-z-2-pi-2-then-the-locus-of-z-is-a-circle-

Question Number 21109 by Tinkutara last updated on 13/Sep/17 $$\mathrm{STATEMENT}-\mathrm{1}\::\:\mathrm{The}\:\mathrm{locus}\:\mathrm{of}\:{z},\:\mathrm{if} \\ $$$$\mathrm{arg}\left(\frac{{z}\:−\:\mathrm{1}}{{z}\:+\:\mathrm{1}}\right)\:=\:\frac{\pi}{\mathrm{2}}\:\mathrm{is}\:\mathrm{a}\:\mathrm{circle}. \\ $$$$\boldsymbol{\mathrm{and}} \\ $$$$\mathrm{STATEMENT}-\mathrm{2}\::\:\mid\frac{{z}\:−\:\mathrm{2}}{{z}\:+\:\mathrm{2}}\mid\:=\:\frac{\pi}{\mathrm{2}},\:\mathrm{then} \\ $$$$\mathrm{the}\:\mathrm{locus}\:\mathrm{of}\:{z}\:\mathrm{is}\:\mathrm{a}\:\mathrm{circle}. \\ $$ Commented by youssoufab last updated…

if-3-2n-3-m-find-3-n-

Question Number 21100 by ibraheem160 last updated on 12/Sep/17 $$\mathrm{if}\:\mathrm{3}^{\mathrm{2n}+\mathrm{3}} =\mathrm{m},\mathrm{find}\:\mathrm{3}^{−\mathrm{n}} \\ $$ Commented by chernoaguero@gmail.com last updated on 13/Sep/17 $$\mathrm{3}^{\mathrm{2}{n}} ×\mathrm{2}^{\mathrm{3}} ={m} \\ $$$$\mathrm{27}\left(\mathrm{3}^{{n}}…

Suppose-in-the-plane-10-pairwise-nonparallel-lines-intersect-one-another-What-is-the-maximum-possible-number-of-polygons-with-finite-areas-that-can-be-formed-

Question Number 21097 by Tinkutara last updated on 12/Sep/17 $$\mathrm{Suppose}\:\mathrm{in}\:\mathrm{the}\:\mathrm{plane}\:\mathrm{10}\:\mathrm{pairwise} \\ $$$$\mathrm{nonparallel}\:\mathrm{lines}\:\mathrm{intersect}\:\mathrm{one}\:\mathrm{another}. \\ $$$$\mathrm{What}\:\mathrm{is}\:\mathrm{the}\:\mathrm{maximum}\:\mathrm{possible}\:\mathrm{number} \\ $$$$\mathrm{of}\:\mathrm{polygons}\:\left(\mathrm{with}\:\mathrm{finite}\:\mathrm{areas}\right)\:\mathrm{that}\:\mathrm{can} \\ $$$$\mathrm{be}\:\mathrm{formed}? \\ $$ Answered by Tinkutara last updated…

The-values-of-k-for-which-the-equation-x-2-x-2-2k-1-1-k-2-has-repeated-roots-when-k-belongs-to-1-1-1-2-0-1-3-0-1-4-2-3-

Question Number 21071 by Tinkutara last updated on 12/Sep/17 $$\mathrm{The}\:\mathrm{values}\:\mathrm{of}\:'{k}'\:\mathrm{for}\:\mathrm{which}\:\mathrm{the}\:\mathrm{equation} \\ $$$$\mid{x}\mid^{\mathrm{2}} \left(\mid{x}\mid^{\mathrm{2}} \:−\:\mathrm{2}{k}\:+\:\mathrm{1}\right)\:=\:\mathrm{1}\:−\:{k}^{\mathrm{2}} ,\:\mathrm{has} \\ $$$$\mathrm{repeated}\:\mathrm{roots},\:\mathrm{when}\:{k}\:\mathrm{belongs}\:\mathrm{to} \\ $$$$\left(\mathrm{1}\right)\:\left\{\mathrm{1},\:−\mathrm{1}\right\} \\ $$$$\left(\mathrm{2}\right)\:\left\{\mathrm{0},\:\mathrm{1}\right\} \\ $$$$\left(\mathrm{3}\right)\:\left\{\mathrm{0},\:−\mathrm{1}\right\} \\ $$$$\left(\mathrm{4}\right)\:\left\{\mathrm{2},\:\mathrm{3}\right\}…

Let-us-consider-an-equation-f-x-x-3-3x-k-0-Then-the-values-of-k-for-which-the-equation-has-1-Exactly-one-root-which-is-positive-then-k-belongs-to-2-Exactly-one-root-which-is-negative-th

Question Number 21070 by Tinkutara last updated on 11/Sep/17 $$\mathrm{Let}\:\mathrm{us}\:\mathrm{consider}\:\mathrm{an}\:\mathrm{equation}\:{f}\left({x}\right)\:=\:{x}^{\mathrm{3}} \\ $$$$−\:\mathrm{3}{x}\:+\:{k}\:=\:\mathrm{0}.\:\mathrm{Then}\:\mathrm{the}\:\mathrm{values}\:\mathrm{of}\:{k}\:\mathrm{for} \\ $$$$\mathrm{which}\:\mathrm{the}\:\mathrm{equation}\:\mathrm{has} \\ $$$$\mathrm{1}.\:\mathrm{Exactly}\:\mathrm{one}\:\mathrm{root}\:\mathrm{which}\:\mathrm{is}\:\mathrm{positive}, \\ $$$$\mathrm{then}\:{k}\:\mathrm{belongs}\:\mathrm{to} \\ $$$$\mathrm{2}.\:\mathrm{Exactly}\:\mathrm{one}\:\mathrm{root}\:\mathrm{which}\:\mathrm{is}\:\mathrm{negative}, \\ $$$$\mathrm{then}\:{k}\:\mathrm{belongs}\:\mathrm{to} \\ $$$$\mathrm{3}.\:\mathrm{One}\:\mathrm{negative}\:\mathrm{and}\:\mathrm{two}\:\mathrm{positive}\:\mathrm{root} \\…

write-out-the-general-summation-formula-for-the-maclaurin-series-expansion-for-1-2-cos-x-cosh-x-

Question Number 86598 by Rio Michael last updated on 29/Mar/20 $$\:\mathrm{write}\:\mathrm{out}\:\mathrm{the}\:\mathrm{general}\:\mathrm{summation}\:\mathrm{formula}\:\mathrm{for} \\ $$$$\:\mathrm{the}\:\mathrm{maclaurin}\:\mathrm{series}\:\mathrm{expansion}\:\mathrm{for}\:\:\frac{\mathrm{1}}{\mathrm{2}}\:\left(\mathrm{cos}\:{x}\:+\:\mathrm{cosh}\:{x}\right) \\ $$ Commented by mathmax by abdo last updated on 31/Mar/20 $${cosx}\:=\sum_{{n}=\mathrm{0}}…

If-the-equation-2cos2x-a-7-cosx-3a-13-0-possesses-atleast-one-real-solution-then-the-maximum-integral-value-of-a-can-be-

Question Number 21048 by Tinkutara last updated on 10/Sep/17 $$\mathrm{If}\:\mathrm{the}\:\mathrm{equation}\:\mathrm{2cos2}{x}\:−\:\left({a}\:+\:\mathrm{7}\right)\mathrm{cos}{x}\:+ \\ $$$$\mathrm{3}{a}\:−\:\mathrm{13}\:=\:\mathrm{0}\:\mathrm{possesses}\:\mathrm{atleast}\:\mathrm{one}\:\mathrm{real} \\ $$$$\mathrm{solution},\:\mathrm{then}\:\mathrm{the}\:\mathrm{maximum}\:\mathrm{integral} \\ $$$$\mathrm{value}\:\mathrm{of}\:'{a}'\:\mathrm{can}\:\mathrm{be} \\ $$ Terms of Service Privacy Policy Contact: info@tinkutara.com

A-spring-with-one-end-attached-to-a-mass-and-the-other-to-a-rigid-support-is-stretched-and-released-a-Magnitude-of-acceleration-when-just-released-is-maximum-b-Magnitude-of-acceleration-when-a

Question Number 21012 by Tinkutara last updated on 10/Sep/17 $$\mathrm{A}\:\mathrm{spring}\:\mathrm{with}\:\mathrm{one}\:\mathrm{end}\:\mathrm{attached}\:\mathrm{to}\:\mathrm{a} \\ $$$$\mathrm{mass}\:\mathrm{and}\:\mathrm{the}\:\mathrm{other}\:\mathrm{to}\:\mathrm{a}\:\mathrm{rigid}\:\mathrm{support}\:\mathrm{is} \\ $$$$\mathrm{stretched}\:\mathrm{and}\:\mathrm{released}. \\ $$$$\left({a}\right)\:\mathrm{Magnitude}\:\mathrm{of}\:\mathrm{acceleration},\:\mathrm{when} \\ $$$$\mathrm{just}\:\mathrm{released}\:\mathrm{is}\:\mathrm{maximum}. \\ $$$$\left({b}\right)\:\mathrm{Magnitude}\:\mathrm{of}\:\mathrm{acceleration},\:\mathrm{when} \\ $$$$\mathrm{at}\:\mathrm{equilibrium}\:\mathrm{position},\:\mathrm{is}\:\mathrm{maximum}. \\ $$$$\left({c}\right)\:\mathrm{Speed}\:\mathrm{is}\:\mathrm{maximum}\:\mathrm{when}\:\mathrm{mass}\:\mathrm{is}\:\mathrm{at} \\…