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Question Number 156137 Answers: 1 Comments: 0

Question Number 156136 Answers: 1 Comments: 0

soit E(x) la partie entiere ,p<q alors la valeur de ∫^q _p E(x)dx =?

$s o i t E (x) l a p a r t i e e n t i e r e, p < q$ $a l o r s l a v a l e u r d e$ ${\int_{p}}^{q} E (x) d x = ?$

Question Number 156133 Answers: 1 Comments: 1

Question Number 156128 Answers: 1 Comments: 0

f:X→Y f(E\F)=f(E)\f(F)⇒f is 1 to 1 I think it is not true since let x1 x2 x3∈E ,x3 x4∈F, and f(x1)=f( x2) it will be not true. but my friend say by ∼q⇒∼p f is not 1 to 1 ⇒f(E\F)≠f(E)\f(F),and take x1 x2∈X, f(x1)=f(x2)=y0 E={x1 ,x2} F={x2} and can proof it is true but I do not know which is true how to proof it?

$f : X \to Y$ $f (E ∖ F) = f (E) ∖ f (F) \Rightarrow f i s 1 t o 1$ $I t h i n k i t i s n o t t r u e$ $s i n c e l e t x 1 x 2 x 3 \in E, x 3 x 4 \in F,$ $a n d f (x 1) = f (x 2) i t w i l l b e n o t t r u e .$ $b u t m y f r i e n d s a y b y \sim q \Rightarrow\sim p$ $f i s n o t 1 t o 1$ $\Rightarrow f (E ∖ F) \neq f (E) ∖ f (F), a n d t a k e$ $x 1 x 2 \in X, f (x 1) = f (x 2) = y 0$ $E = {x 1, x 2} F = {x 2}$ $a n d c a n p r o o f i t i s t r u e$ $b u t I d o n o t k n o w w h i c h i s t r u e$ $h o w t o p r o o f i t ?$

Question Number 156126 Answers: 1 Comments: 1

cos(π/5)=...? with solution pls

$\cos \frac{π}{5} = . . . ? with solution pls$

Question Number 156201 Answers: 0 Comments: 1

A=[((x^n ((x^n^2 ((x^n^3 ∙∙∙∙(x^n^n )^(1/n) ))^(1/n) ))^(1/n) ))^(1/n) ]^(1/n)

$A = {[\sqrt[n]{x^{n} \sqrt[n]{x^{n^{2}} \sqrt[n]{x^{n^{3}} \cdot \cdot \cdot \cdot \sqrt[n]{x^{n^{n}}}}}}]}^{\frac{1}{n}}$

Question Number 156123 Answers: 0 Comments: 0

Question Number 156119 Answers: 1 Comments: 2

solve : ((1+2x)/(1+(√(1+2x))))+((1−2x)/(1−(√(1−2x))))=1

$solve :$ $\frac{1 + 2 x}{1 + \sqrt{1 + 2 x}} + \frac{1 - 2 x}{1 - \sqrt{1 - 2 x}} = 1$

Question Number 156109 Answers: 2 Comments: 0

log _5 ((√(x−9)))−log _5 (3x^2 −12)−log _5 ((√(2x−1))) ≤ 0

$\log_{5} (\sqrt{x - 9}) - \log_{5} ({3 x}^{2} - 12) - \log_{5} (\sqrt{2 x - 1}) ⩽ 0$

Question Number 156108 Answers: 0 Comments: 0

lim_(x→(π/8)) ((1+cot 6x)/(1−sin 4x)) =?

$\lim_{x \to \frac{π}{8}} \frac{1 + \cot 6 x}{1 - \sin 4 x} = ?$

Question Number 156107 Answers: 1 Comments: 1

(1+(1/x))^(x+1) =(1+(1/(2019)))^(2019)

${(1 + \frac{1}{x})}^{x + 1} = {(1 + \frac{1}{2019})}^{2019}$

Question Number 156106 Answers: 0 Comments: 0

Find an equation of the tangen line to the graph of the given equation at the indicated point P 1). xy+16=0 →P(−2,8) 2). y^2 −4x^2 =5→P(−1,3) 3). 2x^3 −x^2 y+y^3 −1=0→P(2,−3) 4). 3y^4 +4x−x^2 sin y−4=0→P(1,0) 5). y^4 +3 y−4x^2 =5x+1→P(1,−2)

$Find an equation of the tangen line$ $to the graph of the given equation$ $at the indicated point P$ $1) . xy + 16 = 0 \to P (- 2, 8)$ $2) . y^{2} - {4 x}^{2} = 5 \to P (- 1, 3)$ $3) . {2 x}^{3} - x^{2} y + y^{3} - 1 = 0 \to P (2, - 3)$ $4) . {3 y}^{4} + 4 x - x^{2} \sin y - 4 = 0 \to P (1, 0)$ $5) . y^{4} + 3 y - {4 x}^{2} = 5 x + 1 \to P (1, - 2)$