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Question Number 87993 Answers: 0 Comments: 1

calculate ∫_0 ^∞ (dx/((x+1)^2 (x+2)^2 (x+3)^2 ))

$c a l c u l a t e \int_{0}^{\infty} \frac{d x}{{(x + 1)}^{2} {(x + 2)}^{2} {(x + 3)}^{2}}$

Question Number 87991 Answers: 1 Comments: 1

Question Number 87989 Answers: 2 Comments: 0

find maximum value 2x^2 +y^2 with constraint x^2 +y^2 −4x+2y+1=0

$find maximum value$ ${2 x}^{2} + y^{2} with constraint$ $x^{2} + y^{2} - 4 x + 2 y + 1 = 0$

Question Number 87988 Answers: 0 Comments: 0

solve the PDE 1−Z=px+py−q(√(pq)) 2−Z=px+qy+sin(p+q) 3−p(1+q^2 )=q(Z−a) 4−Z=xyp^2

$s o l v e t h e P D E$ $1 - Z = p x + p y - q \sqrt{p q}$ $2 - Z = p x + q y + s i n (p + q)$ $3 - p (1 + q^{2}) = q (Z - a)$ $4 - Z = {x y p}^{2}$

Question Number 87977 Answers: 0 Comments: 2

∫_(−(π/2)) ^(π/2) ((sin 2x)/(1+2^x ))dx

$\int_{- \frac{π}{2}}^{\frac{π}{2}} \frac{s i n 2 x}{1 + 2^{x}} d x$

Question Number 87975 Answers: 0 Comments: 7

Question Number 87969 Answers: 1 Comments: 0

Question Number 87966 Answers: 1 Comments: 0

Question Number 87963 Answers: 0 Comments: 1

Question Number 87952 Answers: 1 Comments: 5

Question Number 87944 Answers: 0 Comments: 1

y ′ = ((2xy)/(y^2 −x^2 ))

$y^{'} = \frac{2 xy}{y^{2} - x^{2}}$

Question Number 87930 Answers: 0 Comments: 0

Question Number 87927 Answers: 1 Comments: 2

x+(√y) = 7 (√x) + y = 11 find x+y

$x + \sqrt{y} = 7$ $\sqrt{x} + y = 11$ $find x + y$

Question Number 87939 Answers: 0 Comments: 9

Question Number 87933 Answers: 0 Comments: 10

how many terms are there in (x^2 +x+1)^(11) ?

$how many terms are there$ $in {(x^{2} + x + 1)}^{11} ?$

Question Number 87935 Answers: 1 Comments: 0

A man buys a hen at 9$ and sells it at 11$. He buys the same hen later on at 12$ and sells it now at 14$. What is his total benefit ?

$A m a n b u y s a h e n a t 9 $ a n d s e l l s i t a t 11 $ . H e b u y s$ $t h e s a m e h e n l a t e r o n a t 12 $ a n d s e l l s i t n o w$ $a t 14 $ . W h a t i s h i s t o t a l b e n e f i t ?$

Question Number 87920 Answers: 0 Comments: 1

Question Number 87918 Answers: 0 Comments: 1

Question Number 87911 Answers: 0 Comments: 3

Question Number 87910 Answers: 0 Comments: 0

Question Number 87905 Answers: 1 Comments: 1

y′ = 2^y

$y^{'} = 2^{y}$

Question Number 87904 Answers: 2 Comments: 2

y ′′ −3y′ +2y = 10sin x + 2cos 2x

$y^{″} - {3 y}^{'} + 2 y = 10 \sin x + 2 \cos 2 x$

Question Number 87903 Answers: 0 Comments: 0

find ∫_0 ^∞ ∫_0 ^∞ ((arctan(xy))/((x+y)^2 ))dxdy

$f i n d \int_{0}^{\infty} \int_{0}^{\infty} \frac{a r c t a n (x y)}{{(x + y)}^{2}} d x d y$

Question Number 87902 Answers: 0 Comments: 0

calculate ∫_0 ^∞ ∫_0 ^∞ (e^(−(x^2 +y^2 )) /((x+y)^2 ))dxdy

$c a l c u l a t e \int_{0}^{\infty} \int_{0}^{\infty} \frac{e^{- (x^{2} + y^{2})}}{{(x + y)}^{2}} d x d y$

Question Number 87901 Answers: 0 Comments: 0

calculate ∫∫_([0,1]^2 ) ((arctan(x+y))/(x+y))dxdy

$c a l c u l a t e \int \int_{{[0, 1]}^{2}} \frac{a r c t a n (x + y)}{x + y} d x d y$

Question Number 87893 Answers: 1 Comments: 0

∫ (√((sin x)/(sin x−cos x))) dx

$\int \sqrt{\frac{\sin x}{\sin x - \cos x}} dx$

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