Category: Algebra

Question Number 9869 by bansal22luvi@gmail.com last updated on 10/Jan/17 $$findthevalueof$$$$\underset{n=1}{\sum ^{99}}\frac{n}{1+n^2+n^4}$$$$a)0.46and0.47$$$$b)0.47and0.48$$$$c)0.48and0.49$$$$\left.{d}\right)\mathrm{0}.\mathrm{49}\:{and}\:\mathrm{0}.\mathrm{50} \…

Question Number 140915 by mathdanisur last updated on 14/May/21 Commented by mr W last updated on 14/May/21 $$questioniswrong!$$$$12+18+144+12=186>180!$$ Commented by mathdanisur…

Question Number 75368 by vishalbhardwaj last updated on 10/Dec/19 $$$$$$\mathrm{Find}\mathrm{the}\mathrm{interval}\mathrm{for}\mathrm{which}\mathrm{the}\mathrm{function}$$$$f\left(x\right)=sinx+cosx,\mathrm{for}x\in [0,2\pi ]$$$$\mathrm{is}\mathrm{strictly}\mathrm{inceasing}\mathrm{and}\mathrm{srictly}\mathrm{decreasing}?$$ Commented by vishalbhardwaj last updated on 10/Dec/19…

Question Number 9827 by tawakalitu last updated on 06/Jan/17 $${(7-4\sqrt{3})}^{{\mathrm{x}}^2-4\mathrm{x}+3}+{(7+4\sqrt{3})}^{{\mathrm{x}}^2-4\mathrm{x}+3}=14$$ Answered by ridwan balatif last updated on 06/Jan/17 $$\mathrm{7}−\mathrm{4}\sqrt{\mathrm{3}}=\left(\mathrm{7}−\mathrm{4}\sqrt{\mathrm{3}}\right)\frac{\left(\mathrm{7}+\mathrm{4}\sqrt{\mathrm{3}}\right)}{\left(\mathrm{7}+\mathrm{4}\sqrt{\mathrm{3}}\right)}…

Question Number 140899 by ajfour last updated on 14/May/21 Commented by ajfour last updated on 14/May/21 Commented by ajfour last updated on 14/May/21 $${construction}\:{method}\:{please}.. \…