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Question Number 151435 Answers: 1 Comments: 4

Question Number 151429 Answers: 1 Comments: 0

∫_0 ^π ((xdx)/((a^2 cos^2 x+b^2 sin^2 x)^2 ))

$$\int_{\mathrm{0}} ^{\pi} \frac{\mathrm{xdx}}{\left(\mathrm{a}^{\mathrm{2}} \mathrm{cos}\:^{\mathrm{2}} \mathrm{x}+\mathrm{b}^{\mathrm{2}} \mathrm{sin}\:^{\mathrm{2}} \mathrm{x}\right)^{\mathrm{2}} } \\ $$

Question Number 151428 Answers: 1 Comments: 0

∫((x+2)/((x^2 +3x+3)(√(x+1))))dx

$$\int\frac{\mathrm{x}+\mathrm{2}}{\left(\mathrm{x}^{\mathrm{2}} +\mathrm{3x}+\mathrm{3}\right)\sqrt{\mathrm{x}+\mathrm{1}}}\mathrm{dx} \\ $$$$ \\ $$

Question Number 151426 Answers: 3 Comments: 0

Express (1/(5×9)) in partial fraction

$$\mathrm{Express}\:\frac{\mathrm{1}}{\mathrm{5}×\mathrm{9}}\:\mathrm{in}\:\mathrm{partial}\:\mathrm{fraction} \\ $$

Question Number 151425 Answers: 2 Comments: 0

∫_0 ^(π/2) (dx/((cos x+(√3) sin x)^2 ))dx=(1/( (√3)))

$$\int_{\mathrm{0}} ^{\frac{\pi}{\mathrm{2}}} \frac{\mathrm{dx}}{\left(\mathrm{cos}\:\mathrm{x}+\sqrt{\mathrm{3}}\:\mathrm{sin}\:\mathrm{x}\right)^{\mathrm{2}} }\mathrm{dx}=\frac{\mathrm{1}}{\:\sqrt{\mathrm{3}}} \\ $$

Question Number 151423 Answers: 1 Comments: 0

∫_0 ^(π/2) (dx/(1+tan^5 x))

$$\int_{\mathrm{0}} ^{\frac{\pi}{\mathrm{2}}} \frac{\mathrm{dx}}{\mathrm{1}+\mathrm{tan}\:^{\mathrm{5}} \mathrm{x}} \\ $$

Question Number 151421 Answers: 2 Comments: 2

∫_0 ^(π/4) log (1+tan x)dx

$$\int_{\mathrm{0}} ^{\frac{\pi}{\mathrm{4}}} \mathrm{log}\:\left(\mathrm{1}+\mathrm{tan}\:\mathrm{x}\right)\mathrm{dx} \\ $$

Question Number 151418 Answers: 1 Comments: 0

Find the last three digits: 49^(303) ∙ 3993^(202) ∙ 39^(606)

$$\mathrm{Find}\:\mathrm{the}\:\mathrm{last}\:\mathrm{three}\:\mathrm{digits}: \\ $$$$\mathrm{49}^{\mathrm{303}} \:\centerdot\:\mathrm{3993}^{\mathrm{202}} \:\centerdot\:\mathrm{39}^{\mathrm{606}} \\ $$

Question Number 151415 Answers: 0 Comments: 0

∫_0 ^∞ ((ln(x)arctg(x))/(x(x^2 +1)))dx

$$\int_{\mathrm{0}} ^{\infty} \frac{{ln}\left({x}\right){arctg}\left({x}\right)}{{x}\left({x}^{\mathrm{2}} +\mathrm{1}\right)}{dx} \\ $$

Question Number 151404 Answers: 1 Comments: 1

Question Number 151403 Answers: 0 Comments: 5

x^3 =3^x how do i pls use lambert to find x=3

$$\:{x}^{\mathrm{3}} =\mathrm{3}^{{x}} \\ $$$${how}\:{do}\:{i}\:{pls}\:{use}\:{lambert}\:{to}\: \\ $$$$\:{find}\:{x}=\mathrm{3} \\ $$

Question Number 151401 Answers: 1 Comments: 1

Question Number 151393 Answers: 2 Comments: 0

Question Number 151391 Answers: 1 Comments: 0

if a;b∈R and (a^2 +1)(b^2 +1)+9=6(a+b) find a^2 +b^2 =?

$$\mathrm{if}\:\:\mathrm{a};\mathrm{b}\in\mathbb{R}\:\:\mathrm{and} \\ $$$$\left(\mathrm{a}^{\mathrm{2}} +\mathrm{1}\right)\left(\mathrm{b}^{\mathrm{2}} +\mathrm{1}\right)+\mathrm{9}=\mathrm{6}\left(\mathrm{a}+\mathrm{b}\right) \\ $$$$\mathrm{find}\:\:\mathrm{a}^{\mathrm{2}} +\mathrm{b}^{\mathrm{2}} =? \\ $$

Question Number 151383 Answers: 1 Comments: 1

if x;y>0 peove that: (2/3) ∙ (2/((1/x)+(1/y))) + (1/3) ∙ (√((x^2 +y^2 )/2)) ≥ xy

$$\mathrm{if}\:\:\mathrm{x};\mathrm{y}>\mathrm{0}\:\:\mathrm{peove}\:\mathrm{that}: \\ $$$$\frac{\mathrm{2}}{\mathrm{3}}\:\centerdot\:\frac{\mathrm{2}}{\frac{\mathrm{1}}{\mathrm{x}}+\frac{\mathrm{1}}{\mathrm{y}}}\:+\:\frac{\mathrm{1}}{\mathrm{3}}\:\centerdot\:\sqrt{\frac{\mathrm{x}^{\mathrm{2}} +\mathrm{y}^{\mathrm{2}} }{\mathrm{2}}}\:\geqslant\:\mathrm{xy} \\ $$

Question Number 151377 Answers: 0 Comments: 2

the equation (y+13)(y+a) has no linear term. find value of a? what is means of no linear term. please expkain?

Question Number 151376 Answers: 0 Comments: 0

∫ ((x^8 +1)/( (√(x^9 −2x^8 +1)))) dx ?

$$\:\:\:\:\int\:\frac{\mathrm{x}^{\mathrm{8}} +\mathrm{1}}{\:\sqrt{\mathrm{x}^{\mathrm{9}} −\mathrm{2x}^{\mathrm{8}} +\mathrm{1}}}\:\mathrm{dx}\:?\: \\ $$

Question Number 151374 Answers: 0 Comments: 0

Ω = ∫_0 ^( ∞) (( ln ((1/x) ))/(1 +e^( 2x) )) dx =^? (3/2) ln^( 2) ( 2 ) m.n

$$ \\ $$$$\:\:\:\Omega\:=\:\int_{\mathrm{0}} ^{\:\infty} \frac{\:{ln}\:\left(\frac{\mathrm{1}}{{x}}\:\right)}{\mathrm{1}\:+{e}^{\:\mathrm{2}{x}} }\:{dx}\:\overset{?} {=}\:\frac{\mathrm{3}}{\mathrm{2}}\:{ln}^{\:\mathrm{2}} \left(\:\mathrm{2}\:\right) \\ $$$$\:\:{m}.{n} \\ $$

Question Number 151371 Answers: 1 Comments: 0

a;b∈N (a+b)^2 ∙(a-b)=128 ab=?

$$\mathrm{a};\mathrm{b}\in\mathbb{N} \\ $$$$\left(\mathrm{a}+\mathrm{b}\right)^{\mathrm{2}} \centerdot\left(\mathrm{a}-\mathrm{b}\right)=\mathrm{128} \\ $$$$\mathrm{ab}=? \\ $$

Question Number 151361 Answers: 1 Comments: 0

if x+y=45 prove that: ((1 - tan(x))/(1 - tan(y))) = tan(2y)

$$\mathrm{if}\:\:\boldsymbol{\mathrm{x}}+\boldsymbol{\mathrm{y}}=\mathrm{45}\:\:\mathrm{prove}\:\mathrm{that}: \\ $$$$\frac{\mathrm{1}\:-\:\mathrm{tan}\left(\mathrm{x}\right)}{\mathrm{1}\:-\:\mathrm{tan}\left(\mathrm{y}\right)}\:=\:\mathrm{tan}\left(\mathrm{2y}\right) \\ $$

Question Number 151360 Answers: 0 Comments: 0

find max(ℜ(I)+ℑ(I)) for the integral I = ∫_z ^( z+1) cos(cos(cos(x^(cos(cos(cos(x)))) )))dx z ∈ R

$$\: \\ $$$$\:\:\mathrm{find}\:\mathrm{max}\left(\Re\left(\mathrm{I}\right)+\Im\left(\mathrm{I}\right)\right)\:\mathrm{for}\:\mathrm{the}\:\mathrm{integral} \\ $$$$\:\:\mathrm{I}\:=\:\int_{{z}} ^{\:{z}+\mathrm{1}} \:\mathrm{cos}\left(\mathrm{cos}\left(\mathrm{cos}\left({x}^{\mathrm{cos}\left(\mathrm{cos}\left(\mathrm{cos}\left({x}\right)\right)\right)} \right)\right)\right){dx} \\ $$$$\:\:{z}\:\in\:\mathbb{R} \\ $$$$\: \\ $$

Question Number 151357 Answers: 1 Comments: 6

Question Number 151351 Answers: 1 Comments: 0

Question Number 151350 Answers: 0 Comments: 4

Question Number 151346 Answers: 1 Comments: 0

x^2 + 5x + 25 = 0 ⇒ x^3 - 100 = ?

$$\mathrm{x}^{\mathrm{2}} \:+\:\mathrm{5x}\:+\:\mathrm{25}\:=\:\mathrm{0}\:\:\Rightarrow\:\:\mathrm{x}^{\mathrm{3}} \:-\:\mathrm{100}\:=\:? \\ $$

Question Number 151345 Answers: 1 Comments: 0

∫_0 ^π (e^(cos x) /(e^(cos x) +e^(−cos x) ))dx

$$\int_{\mathrm{0}} ^{\pi} \frac{\mathrm{e}^{\mathrm{cos}\:\mathrm{x}} }{\mathrm{e}^{\mathrm{cos}\:\mathrm{x}} +\mathrm{e}^{−\mathrm{cos}\:\mathrm{x}} }\mathrm{dx} \\ $$

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