Category: None

Question Number 32745 by vakil vishaWakrma last updated on 01/Apr/18 $$\mathrm{The}\mathrm{first},\mathrm{second}\mathrm{and}\mathrm{middle}\mathrm{terms}\mathrm{of}\mathrm{an}$$$$\mathrm{AP}\mathrm{are}a,b,c\mathrm{respectively}.\mathrm{Their}\mathrm{sum}\mathrm{is}$$ Answered by Rasheed.Sindhi last updated on 01/Apr/18 $$\mathrm{Let}\mathrm{the}\mathrm{AP}\mathrm{has}\mathrm{n}\left(\mathrm{odd}\right)\mathrm{terms}\mathrm{and}\mathrm{common}$$$$\mathrm{difference}\:\mathrm{d}.…

Question Number 98057 by PengagumRahasiamu last updated on 11/Jun/20 $$\mathrm{The}\mathrm{number}\mathrm{of}\mathrm{real}\mathrm{solutions}\mathrm{of}$$$$3^x+4^x=5^x\mathrm{is}\mathrm{\_}\mathrm{\_}\mathrm{\_}\mathrm{\_}.$$ Answered by Rio Michael last updated on 11/Jun/20…

Question Number 32418 by hizmzm1 last updated on 24/Mar/18 $$\mathrm{The}\mathrm{number}\mathrm{of}\mathrm{real}\mathrm{roots}\mathrm{or}$$$$x^8-x^5-x+1=0\mathrm{is}\mathrm{equal}\mathrm{to}$$ Commented by hizmzm1 last updated on 27/Mar/18 $$\mathrm{1}^{\mathrm{8}} −\mathrm{1}^{\mathrm{5}}…

Question Number 32329 by naeems1000 last updated on 23/Mar/18 $$\mathrm{The}\mathrm{smallest}\mathrm{number}\mathrm{which}\mathrm{must}\mathrm{be}$$$$\mathrm{subtracted}\mathrm{from}3400\mathrm{to}\mathrm{make}\mathrm{it}\mathrm{a}$$$$\mathrm{perfect}\mathrm{cube}\mathrm{is}\mathrm{\_}\mathrm{\_}\mathrm{\_}\mathrm{\_}\mathrm{\_}.$$ Answered by Joel578 last updated on 23/Mar/18 $$\mathrm{15}^{\mathrm{3}} \:=\:\mathrm{3375}…

Question Number 97658 by Vishal Sharma last updated on 09/Jun/20 $$\mathrm{The}\mathrm{value}\mathrm{of}\cos \frac{2\pi }{7}+\cos \frac{4\pi }{7}+\cos \frac{6\pi }{7}\mathrm{is}$$ Commented by bemath last updated on 09/Jun/20 $$x=\frac{2\pi }{7}$$$$\frac{\cos x+\cos 2x+\cos 3x}{2\sin x}\times 2\sin x$$$$\frac{\mathrm{sin}\:\mathrm{2}{x}+\mathrm{2sin}{x}\:\mathrm{cos}\:\mathrm{2}{x}+\mathrm{2sin}\:{x}\mathrm{cos}\:\mathrm{3}{x}\:}{\mathrm{2sin}\:{x}}\:=…