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Question Number 146602 Answers: 1 Comments: 0

Question Number 146599 Answers: 0 Comments: 1

(1) from butanol what you need prepare 1 −butan ? (2) from alchols prepare 1−propan ? (3)from alkynes and what you need prepare C is and trans ethene ? (4) By hydrolysis of alkyle halide prepare 1−butane ?

$(1) f r o m b u t a n o l w h a t y o u n e e d p r e p a r e$ $1 - b u t a n ?$ $(2) f r o m a l c h o l s p r e p a r e 1 - p r o p a n ?$ $(3) f r o m a l k y n e s a n d w h a t y o u n e e d p r e p a r e C$ $i s a n d t r a n s e t h e n e ?$ $(4) B y h y d r o l y s i s o f a l k y l e h a l i d e p r e p a r e$ $1 - b u t a n e ?$

Question Number 146597 Answers: 5 Comments: 0

∫ ((cos 5x+cos 4x)/(1−2cos 3x)) dx =? ∫ ((√(tan x))/(sin 2x)) dx =? ∫ (dx/( (√(cos^3 x sin^5 x)))) =?

$\int \frac{\cos 5 x + \cos 4 x}{1 - 2 \cos 3 x} dx = ?$ $\int \frac{\sqrt{\tan x}}{\sin 2 x} dx = ?$ $\int \frac{dx}{\sqrt{\cos^{3} x \sin^{5} x}} = ?$

Question Number 146592 Answers: 0 Comments: 0

By hydrolysis of Grinyard reagent prepare butan ?

$B y h y d r o l y s i s o f G r i n y a r d r e a g e n t p r e p a r e b u t a n ?$

Question Number 146590 Answers: 1 Comments: 1

Question Number 146589 Answers: 1 Comments: 0

arcsin (sin 10) = ?

$a r c s i n (s i n 10) = ?$

Question Number 146587 Answers: 0 Comments: 0

arccos((π/2) - (1/2) arccos (4/5)) = ?

$a r c c o s (\frac{π}{2} - \frac{1}{2} a r c c o s \frac{4}{5}) = ?$

Question Number 146586 Answers: 0 Comments: 1

Question Number 146584 Answers: 0 Comments: 0

......nice ... ... ... calculus...... Ω= ∫_0 ^( 4) x^( 2) d (⌊x+⌊x +⌊x+⌊x⌋⌋⌋)=?

$. . . . . . n i c e . . . . . . . . . c a l c u l u s . . . . . .$ $Ω = \int_{0}^{4} x^{2} d (⌊ x + ⌊ x + ⌊ x + ⌊ x ⌋ ⌋ ⌋) = ?$

Question Number 146582 Answers: 1 Comments: 0

∫ tan^4 x cos^2 x dx =?

$\int \tan^{4} x \cos^{2} x dx = ?$

Question Number 146577 Answers: 2 Comments: 1

Question Number 146559 Answers: 2 Comments: 0

lim_(x→−∞) (−2x+1+((8x^3 +2x^2 −10))^(1/3) )=? lim_(x→∞) (((125x^3 −5x^2 ))^(1/3) −4−5x )=?

$\lim_{x \to - \infty} (- 2 x + 1 + \sqrt[3]{8 x^{3} + 2 x^{2} - 10}) = ?$ $\lim_{x \to \infty} (\sqrt[3]{125 x^{3} - 5 x^{2}} - 4 - 5 x) = ?$

Question Number 146550 Answers: 0 Comments: 0

f(x)=x^3 arctan((2/x)) 1)calculate f^((n)) (x) 2)developp f at integr srie at x_0 =1

$f (x) = x^{3} \arctan (\frac{2}{x})$ $1) calculate f^{(n)} (x)$ $2) developp f at integr srie at x_{0} = 1$

Question Number 146549 Answers: 2 Comments: 0

find lim_(x→0) ((cos(x−sinx)+1−cos(x^2 ))/x^2 )

$find \lim_{x \to 0} \frac{\cos (x - sinx) + 1 - \cos (x^{2})}{x^{2}}$

Question Number 146548 Answers: 2 Comments: 0

let f(x)=cos(αx) developp f at fourier serie (α real)

$let f (x) = \cos (α x) developp f at fourier serie (α real)$

Question Number 146547 Answers: 3 Comments: 0

calculate ∫_(∣z∣=5) ((2−z^2 )/((z^2 +9)(z−i)^2 ))dz

$calculate \int_{∣ z ∣= 5} \frac{2 - z^{2}}{(z^{2} + 9) {(z - i)}^{2}} dz$

Question Number 146546 Answers: 2 Comments: 0

find ∫_(∣z−1∣=3) ((cos(πz))/((z−2)(z^2 +4)))dz

$find \int_{∣ z - 1 ∣= 3} \frac{\cos (π z)}{(z - 2) (z^{2} + 4)} dz$

Question Number 146545 Answers: 1 Comments: 0

arcsin(x^2 -3) = arcsin(x^2 +3x+4) find x=?

$a r c s i n (x^{2} - 3) = a r c s i n (x^{2} + 3 x + 4)$ $f i n d x = ?$

Question Number 146535 Answers: 2 Comments: 0

{ ((((15)/(x^2 +xy)) + (3/(y^2 +xy)) = 5,5)),((((12)/(x^2 +xy)) - (6/(y^2 +xy)) = 3)) :} ⇒ ∣x+y∣=?

${\begin{cases} \frac{15}{x^{2} + x y} + \frac{3}{y^{2} + x y} = 5, 5 \\ \frac{12}{x^{2} + x y} - \frac{6}{y^{2} + x y} = 3 \end{cases} \Rightarrow ∣ x + y ∣= ?$

Question Number 146529 Answers: 1 Comments: 0

Question Number 146528 Answers: 1 Comments: 0

Question Number 146524 Answers: 0 Comments: 0

find ∫_0 ^∞ ((xsinx)/((x^4 +1)^3 ))dx

$find \int_{0}^{\infty} \frac{xsinx}{{(x^{4} + 1)}^{3}} dx$

Question Number 146523 Answers: 2 Comments: 0

Question Number 146521 Answers: 1 Comments: 0

(i - 1)^(−100) = ?

${(i - 1)}^{- 100} = ?$

Question Number 146519 Answers: 0 Comments: 0

Question Number 146508 Answers: 1 Comments: 0

Find the sum of the roots of the equation: 16 ∙ 2^(∣x∣) + 5 ∙ 2^x = 42

$F i n d t h e s u m o f t h e r o o t s o f t h e$ $e q u a t i o n :$ $16 \cdot 2^{∣ x ∣} + 5 \cdot 2^{x} = 42$

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