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AllQuestion and Answers: Page 642

Question Number 149100 Answers: 1 Comments: 0

Question Number 149092 Answers: 0 Comments: 0

Question Number 149085 Answers: 0 Comments: 0

Question Number 149081 Answers: 1 Comments: 0

Question Number 149080 Answers: 0 Comments: 0

Question Number 149068 Answers: 1 Comments: 0

Question Number 149060 Answers: 1 Comments: 0

if 4z(√z) − 11(√z) = 5 find 2z − (√z) = ?

$${if}\:\:\:\mathrm{4}{z}\sqrt{{z}}\:−\:\mathrm{11}\sqrt{{z}}\:=\:\mathrm{5} \\ $$$${find}\:\:\:\mathrm{2}{z}\:−\:\sqrt{{z}}\:=\:? \\ $$

Question Number 149045 Answers: 1 Comments: 0

∣a^(→) ∣ = ∣b^(→) ∣ = 4 and cos𝛂 = 60° find a^(→) ∙ b^(→) = ?

$$\mid\overset{\rightarrow} {\boldsymbol{{a}}}\mid\:=\:\mid\overset{\rightarrow} {\boldsymbol{{b}}}\mid\:=\:\mathrm{4}\:\:\:{and}\:\:\:{cos}\boldsymbol{\alpha}\:=\:\mathrm{60}° \\ $$$${find}\:\:\:\overset{\rightarrow} {\boldsymbol{{a}}}\:\centerdot\:\overset{\rightarrow} {\boldsymbol{{b}}}\:=\:? \\ $$

Question Number 149043 Answers: 1 Comments: 3

Question Number 149042 Answers: 1 Comments: 0

100x^(lg(x)) = x^3 ⇒ x = ?

$$\mathrm{100}\boldsymbol{{x}}^{\boldsymbol{{lg}}\left(\boldsymbol{{x}}\right)} \:=\:\boldsymbol{{x}}^{\mathrm{3}} \:\:\:\Rightarrow\:\:\:\boldsymbol{{x}}\:=\:? \\ $$

Question Number 149041 Answers: 1 Comments: 3

(√(x - 3 + 2(√(x - 4)))) − (√(x + 5 - 6(√(x - 2)))) =2 ⇒ x = ?

$$\sqrt{{x}\:-\:\mathrm{3}\:+\:\mathrm{2}\sqrt{{x}\:-\:\mathrm{4}}}\:−\:\sqrt{{x}\:+\:\mathrm{5}\:-\:\mathrm{6}\sqrt{{x}\:-\:\mathrm{2}}}\:=\mathrm{2} \\ $$$$\Rightarrow\:\boldsymbol{{x}}\:=\:? \\ $$

Question Number 149040 Answers: 1 Comments: 0

{ ((x^2 +xy=4x)),((y^2 +xy=4y)) :} ⇒ log_(16) ^((x_1 +y_1 +x_2 +y_2 )) = ?

$$\begin{cases}{{x}^{\mathrm{2}} +{xy}=\mathrm{4}{x}}\\{{y}^{\mathrm{2}} +{xy}=\mathrm{4}{y}}\end{cases}\:\:\:\Rightarrow\:\:{log}_{\mathrm{16}} ^{\left(\boldsymbol{{x}}_{\mathrm{1}} +\boldsymbol{{y}}_{\mathrm{1}} +\boldsymbol{{x}}_{\mathrm{2}} +\boldsymbol{{y}}_{\mathrm{2}} \right)} \:=\:? \\ $$

Question Number 149061 Answers: 0 Comments: 0

factorise 4/5^x +1

$$\mathrm{factorise}\:\:\:\:\mathrm{4}/\mathrm{5}^{\mathrm{x}} +\mathrm{1} \\ $$

Question Number 149036 Answers: 1 Comments: 0

if x;y;z>0 and xyz=8 prove that: (1/(x^2 + 8)) + (1/(y^2 + 8)) + (1/(z^2 + 8)) ≤ (1/4)

$${if}\:\:\:{x};{y};{z}>\mathrm{0}\:\:\:{and}\:\:\:{xyz}=\mathrm{8}\:\:\:{prove}\:{that}: \\ $$$$\frac{\mathrm{1}}{{x}^{\mathrm{2}} \:+\:\mathrm{8}}\:+\:\frac{\mathrm{1}}{{y}^{\mathrm{2}} \:+\:\mathrm{8}}\:+\:\frac{\mathrm{1}}{{z}^{\mathrm{2}} \:+\:\mathrm{8}}\:\leqslant\:\frac{\mathrm{1}}{\mathrm{4}} \\ $$

Question Number 149031 Answers: 2 Comments: 0

Question Number 149030 Answers: 0 Comments: 0

f(x)=4_−_(5^x +1) x=0,1,2..... find the moment generating function

$$\mathrm{f}\left(\mathrm{x}\right)=\underset{\underset{\mathrm{5}^{\mathrm{x}} +\mathrm{1}} {−}} {\mathrm{4}}\:\:\:\:\mathrm{x}=\mathrm{0},\mathrm{1},\mathrm{2}.....\:\:\:\mathrm{find}\:\mathrm{the}\:\mathrm{moment}\: \\ $$$$\mathrm{generating}\:\mathrm{function} \\ $$

Question Number 149077 Answers: 1 Comments: 0

Ω := ∫_0 ^( 1) ((ln ( 1+ (√x) ))/(1+x)) dx =? .....m.n.....

$$ \\ $$$$\:\:\:\:\:\:\Omega\::=\:\int_{\mathrm{0}} ^{\:\mathrm{1}} \frac{\mathrm{ln}\:\left(\:\mathrm{1}+\:\sqrt{{x}}\:\right)}{\mathrm{1}+{x}}\:{dx}\:=? \\ $$$$\:.....{m}.{n}..... \\ $$

Question Number 149025 Answers: 1 Comments: 3

Solve for equation: cos^3 (x) - sin^3 (x) + 1

$${Solve}\:{for}\:{equation}: \\ $$$${cos}^{\mathrm{3}} \left({x}\right)\:-\:{sin}^{\mathrm{3}} \left({x}\right)\:+\:\mathrm{1} \\ $$

Question Number 149024 Answers: 2 Comments: 0

Question Number 149023 Answers: 1 Comments: 0

∫_0 ^(π/4) ((tsint)/(1+cos^2 t))dt=∫_0 ^(π/4) ((tcost)/(1+sin^2 t))dt true or false ??

$$\int_{\mathrm{0}} ^{\frac{\pi}{\mathrm{4}}} \frac{{tsint}}{\mathrm{1}+{cos}^{\mathrm{2}} {t}}{dt}=\overset{\frac{\pi}{\mathrm{4}}} {\int}_{\mathrm{0}} \frac{{tcost}}{\mathrm{1}+{sin}^{\mathrm{2}} {t}}{dt} \\ $$$${true}\:{or}\:{false}\:?? \\ $$

Question Number 149008 Answers: 2 Comments: 3

Question Number 148997 Answers: 0 Comments: 0

find number of rational terms in the expansion of ((3)^(1/5) +(2)^(1/3) )^(15) . prove sum of all irrarional terms is greater than sum of all rational terms.

$${find}\:{number}\:{of}\:{rational}\:{terms}\: \\ $$$${in}\:{the}\:{expansion}\:{of}\:\left(\sqrt[{\mathrm{5}}]{\mathrm{3}}+\sqrt[{\mathrm{3}}]{\mathrm{2}}\right)^{\mathrm{15}} . \\ $$$${prove}\:{sum}\:{of}\:{all}\:{irrarional}\:{terms}\: \\ $$$${is}\:{greater}\:{than}\:{sum}\:{of}\:{all}\:{rational} \\ $$$${terms}. \\ $$

Question Number 148994 Answers: 1 Comments: 0

(102)^4 easy way to caculate

$$\left(\mathrm{102}\right)^{\mathrm{4}} \\ $$$${easy}\:{way}\:{to}\:{caculate} \\ $$

Question Number 148993 Answers: 2 Comments: 5

if M is a point on the line y=x and points P(0,1),Q(2,0) are such that PM+PQ is minimum then find P

$${if}\:{M}\:{is}\:{a}\:{point}\:{on}\:{the}\:{line}\:{y}={x}\:{and} \\ $$$${points}\:{P}\left(\mathrm{0},\mathrm{1}\right),{Q}\left(\mathrm{2},\mathrm{0}\right)\:{are}\:{such}\:{that} \\ $$$${PM}+{PQ}\:{is}\:{minimum}\:{then}\:{find}\:{P} \\ $$

Question Number 148992 Answers: 2 Comments: 0

Question Number 148991 Answers: 1 Comments: 0

The largest value of k for which the circle x^2 +y^2 =k^2 lies completely in the interior of the parabola y^2 =4x+16 ?

$${The}\:{largest}\:{value}\:{of}\:{k}\:{for}\:{which}\: \\ $$$${the}\:{circle}\:{x}^{\mathrm{2}} +{y}^{\mathrm{2}} ={k}^{\mathrm{2}} \:{lies}\:{completely} \\ $$$${in}\:{the}\:{interior}\:{of}\:{the}\:{parabola} \\ $$$${y}^{\mathrm{2}} =\mathrm{4}{x}+\mathrm{16}\:? \\ $$

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