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Question Number 95202 Answers: 0 Comments: 4

Question Number 95342 Answers: 2 Comments: 0

determine the value of k such that the point A(4,−2,6) B(0,1,0) C(1,0,−5) and D(1,k,−2) lie on the same plane

$$\mathrm{determine}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\:\mathrm{k}\:\mathrm{such}\:\mathrm{that}\: \\ $$$$\mathrm{the}\:\mathrm{point}\:\mathrm{A}\left(\mathrm{4},−\mathrm{2},\mathrm{6}\right)\:\mathrm{B}\left(\mathrm{0},\mathrm{1},\mathrm{0}\right)\:\mathrm{C}\left(\mathrm{1},\mathrm{0},−\mathrm{5}\right) \\ $$$$\mathrm{and}\:\mathrm{D}\left(\mathrm{1},\mathrm{k},−\mathrm{2}\right)\:\mathrm{lie}\:\mathrm{on}\:\mathrm{the}\:\mathrm{same} \\ $$$$\mathrm{plane}\: \\ $$

Question Number 95341 Answers: 0 Comments: 0

Q) A light falls on two slits 0.15 mm apart.An interference pattern is produced on a screen 60 cm from the slits, if the distance between the second and the fifth bright bands (frings) is 0.7 cm. Calculate the avelength of the used light. solution: Δy_(n=2→n=5) =0.7⇒Δy=0.7/3=0.233×10^(−2) m Δy=((sλ)/d) ⇒λ=((dΔy)/s)=((0.15×10^(−3) ×0.233×10^(−2) )/(60×10^(−2) )) =5.83×10^(−7) =583 nm

$$\left.\mathrm{Q}\right)\:\mathrm{A}\:\mathrm{light}\:\mathrm{falls}\:\mathrm{on}\:\mathrm{two}\:\mathrm{slits}\:\mathrm{0}.\mathrm{15}\:{mm}\:\mathrm{apart}.\mathrm{An}\:\mathrm{interference}\:\mathrm{pattern} \\ $$$$\mathrm{is}\:\mathrm{produced}\:\mathrm{on}\:\mathrm{a}\:\mathrm{screen}\:\mathrm{60}\:{cm}\:\mathrm{from}\:\mathrm{the}\:\mathrm{slits},\:\mathrm{if}\: \\ $$$$\mathrm{the}\:\mathrm{distance}\:\mathrm{between}\:\mathrm{the}\:\mathrm{second}\:\mathrm{and}\:\mathrm{the}\:\mathrm{fifth}\: \\ $$$$\mathrm{bright}\:\mathrm{bands}\:\left(\mathrm{frings}\right)\:\mathrm{is}\:\mathrm{0}.\mathrm{7}\:{cm}.\:\mathrm{Calculate}\:\mathrm{the}\: \\ $$$$\mathrm{avelength}\:\mathrm{of}\:\mathrm{the}\:\mathrm{used}\:\mathrm{light}. \\ $$$$\boldsymbol{{solution}}: \\ $$$$\Delta{y}_{{n}=\mathrm{2}\rightarrow\mathrm{n}=\mathrm{5}} =\mathrm{0}.\mathrm{7}\Rightarrow\Delta{y}=\mathrm{0}.\mathrm{7}/\mathrm{3}=\mathrm{0}.\mathrm{233}×\mathrm{10}^{−\mathrm{2}} \:{m} \\ $$$$\Delta{y}=\frac{{s}\lambda}{{d}}\:\Rightarrow\lambda=\frac{{d}\Delta{y}}{{s}}=\frac{\mathrm{0}.\mathrm{15}×\mathrm{10}^{−\mathrm{3}} ×\mathrm{0}.\mathrm{233}×\mathrm{10}^{−\mathrm{2}} }{\mathrm{60}×\mathrm{10}^{−\mathrm{2}} } \\ $$$$=\mathrm{5}.\mathrm{83}×\mathrm{10}^{−\mathrm{7}} =\mathrm{583}\:{nm} \\ $$

Question Number 95199 Answers: 1 Comments: 0

∫_(−π) ^π cosxln((1+x)/(1−x)) dx=?

$$\int_{−\pi} ^{\pi} {cosxln}\frac{\mathrm{1}+{x}}{\mathrm{1}−{x}}\:{dx}=? \\ $$

Question Number 95198 Answers: 1 Comments: 0

∫(√((x+2)/(x−3)))dx=?

$$\int\sqrt{\frac{{x}+\mathrm{2}}{{x}−\mathrm{3}}}{dx}=? \\ $$

Question Number 95182 Answers: 1 Comments: 0

Question Number 95180 Answers: 0 Comments: 1

Question Number 95167 Answers: 0 Comments: 2

the first term in a geometric series is (((2x + 7))/(2x−5)) and the common ratio is (((2x−5))/(2x + 7)) find the set of values of x for which all the terms are possible.

$$\mathrm{the}\:\mathrm{first}\:\mathrm{term}\:\mathrm{in}\:\mathrm{a}\:\mathrm{geometric}\:\mathrm{series}\:\mathrm{is}\:\frac{\left(\mathrm{2}{x}\:+\:\mathrm{7}\right)}{\mathrm{2}{x}−\mathrm{5}}\:\mathrm{and}\:\mathrm{the}\:\mathrm{common}\:\mathrm{ratio}\:\mathrm{is} \\ $$$$\:\frac{\left(\mathrm{2}{x}−\mathrm{5}\right)}{\mathrm{2}{x}\:+\:\mathrm{7}}\:\mathrm{find}\:\mathrm{the}\:\mathrm{set}\:\mathrm{of}\:\mathrm{values}\:\mathrm{of}\:{x}\:\mathrm{for}\:\mathrm{which}\:\mathrm{all}\:\mathrm{the}\:\mathrm{terms}\:\mathrm{are}\:\mathrm{possible}. \\ $$

Question Number 95164 Answers: 0 Comments: 3

if a_k =tan (θ+((kπ)/n)), find ((Σ_(k=1) ^n a_k )/(Π_(k=1) ^n a_k ))=?

$${if}\:{a}_{{k}} =\mathrm{tan}\:\left(\theta+\frac{{k}\pi}{{n}}\right), \\ $$$${find}\:\frac{\underset{{k}=\mathrm{1}} {\overset{{n}} {\sum}}{a}_{{k}} }{\underset{{k}=\mathrm{1}} {\overset{{n}} {\prod}}{a}_{{k}} }=? \\ $$

Question Number 95159 Answers: 1 Comments: 1

((8−x))^(1/(3 )) + (√x) = 2

$$\sqrt[{\mathrm{3}\:\:}]{\mathrm{8}−\mathrm{x}}\:+\:\sqrt{\mathrm{x}}\:=\:\mathrm{2}\: \\ $$

Question Number 95158 Answers: 0 Comments: 0

find the domain and range f(x)=⌊(1/(sin{x}))⌋

$${find}\:{the}\:{domain}\:{and}\:{range} \\ $$$${f}\left({x}\right)=\lfloor\frac{\mathrm{1}}{{sin}\left\{{x}\right\}}\rfloor \\ $$

Question Number 95150 Answers: 1 Comments: 0

how do you solve f(x) +2 f((1/(1−x))) = x for f ?