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The-side-of-a-square-is-increasing-at-a-rate-of-0-1cms-1-Find-the-rate-of-increase-of-the-perimeter-of-the-square-when-the-length-of-side-is-4cm-

Question Number 37795 by Rio Mike last updated on 17/Jun/18 $${The}\:{side}\:{of}\:{a}\:{square}\:{is}\:{increasing} \\ $$$${at}\:{a}\:{rate}\:{of}\:\mathrm{0}.\mathrm{1}{cms}^{−\mathrm{1}} .\:{Find}\:{the} \\ $$$${rate}\:{of}\:{increase}\:{of}\:{the}\:{perimeter} \\ $$$${of}\:{the}\:{square}\:{when}\:{the}\:{length}\:{of} \\ $$$${side}\:{is}\:\mathrm{4}{cm}. \\ $$ Answered by tanmay.chaudhury50@gmail.com…

1-n-n-n-1-2-n-n-1-n-2-3-n-n-1-n-2-n-3-4-

Question Number 37728 by kunal1234523 last updated on 17/Jun/18 $$\mathrm{1}+\mathrm{n}+\frac{\mathrm{n}\left(\mathrm{n}−\mathrm{1}\right)}{\mathrm{2}!}+\frac{\mathrm{n}\left(\mathrm{n}−\mathrm{1}\right)\left(\mathrm{n}−\mathrm{2}\right)}{\mathrm{3}!}+\frac{\mathrm{n}\left(\mathrm{n}−\mathrm{1}\right)\left(\mathrm{n}−\mathrm{2}\right)\left(\mathrm{n}−\mathrm{3}\right)}{\mathrm{4}!}+……..= \\ $$ Answered by tanmay.chaudhury50@gmail.com last updated on 17/Jun/18 $$\left(\mathrm{1}+{x}\right)^{{n}} =\mathrm{1}+{nC}_{\mathrm{1}} {x}+{nC}_{\mathrm{2}} {x}^{\mathrm{2}} +{nC}_{\mathrm{3}} {x}^{\mathrm{3}}…

A-commitee-of-2-boys-and-1-girl-has-to-be-formed-from-a-class-of-4-boys-and-3-girls-give-the-number-of-ways-these-can-be-done-

Question Number 37711 by Rio Mike last updated on 16/Jun/18 $${A}\:{commitee}\:{of}\:\mathrm{2}\:{boys}\:{and}\:\mathrm{1}\:{girl} \\ $$$${has}\:{to}\:{be}\:{formed}\:{from}\:{a}\:{class} \\ $$$${of}\:\mathrm{4}\:{boys}\:{and}\:\mathrm{3}\:{girls}\:{give}\:{the}\:{number} \\ $$$${of}\:{ways}\:{these}\:{can}\:{be}\:{done} \\ $$ Answered by math1967 last updated on…