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Question Number 165672 Answers: 0 Comments: 0

Question Number 165670 Answers: 0 Comments: 0

Question Number 165669 Answers: 1 Comments: 1

Question Number 165751 Answers: 1 Comments: 0

x^3 +6x−9=0 ⇒x=?

$x^{3} + 6 x - 9 = 0 \Rightarrow x = ?$

Question Number 165653 Answers: 1 Comments: 2

Question Number 165651 Answers: 1 Comments: 5

If the equation (2x−1)−p(x^2 +2)=0, where p is constant, has imaginary roots, deduce that 2p^2 +p−1≥0.

$I f t h e e q u a t i o n (2 x - 1) - p (x^{2} + 2) = 0,$ $w h e r e p i s c o n s t a n t, h a s i m a g i n a r y$ $r o o t s, d e d u c e t h a t 2 p^{2} + p - 1 ⩾ 0 .$

Question Number 165650 Answers: 0 Comments: 0

Question Number 165649 Answers: 0 Comments: 0

Question Number 165648 Answers: 0 Comments: 0

Question Number 165639 Answers: 1 Comments: 1

Question Number 165692 Answers: 1 Comments: 0

why we use the current as conventional in a circuit?

$w h y w e u s e t h e c u r r e n t a s c o n v e n t i o n a l i n$ $a c i r c u i t ?$

Question Number 165691 Answers: 1 Comments: 0

why can′t birds catch by the AC current?

$w h y {c a n}^{'} t b i r d s c a t c h b y t h e A C c u r r e n t ?$

Question Number 165637 Answers: 1 Comments: 0

37tanx =11tan3x solve it

$37 t a n x = 11 t a n 3 x$ $s o l v e i t$

Question Number 165620 Answers: 1 Comments: 0

solve z^7 =−4

$s o l v e$ $z^{7} = - 4$

Question Number 165617 Answers: 1 Comments: 0

what is the focal length formula for combined lenses? if lenses more than tow?

$w h a t i s t h e f o c a l l e n g t h f o r m u l a f o r$ $c o m b i n e d l e n s e s ? i f l e n s e s m o r e t h a n$ $t o w ?$

Question Number 165616 Answers: 2 Comments: 1

Question Number 165615 Answers: 1 Comments: 0

∫_( 0) ^( 1) (dx/( (√x) ((x)^(1/3) +(x)^(1/4) )))=?

$\int_{0}^{1} \frac{d x}{\sqrt{x} (\sqrt[3]{x} + \sqrt[4]{x})} = ?$

Question Number 165641 Answers: 2 Comments: 0

Given that y = (1/x) (a) Show that y^((n)) = (((−1)^n n!)/x^(n+1) ) (b) Find an expression for y^((n−1)) + y^((n))

$Given that y = \frac{1}{x}$ $(a) Show that y^{(n)} = \frac{{(- 1)}^{n} n!}{x^{n + 1}}$ $(b) Find an expression for y^{(n - 1)} + y^{(n)}$

Question Number 165608 Answers: 0 Comments: 0

Reupload unanswered question. sec^2 1° + sec^2 2° + sec^2 3° + …+ sec^2 89° = ?

$Reupload unanswered question .$ $\sec^{2} 1 ° + \sec^{2} 2 ° + \sec^{2} 3 ° + \dots + \sec^{2} 89 ° = ?$

Question Number 165600 Answers: 0 Comments: 19

Question Number 165599 Answers: 1 Comments: 0

Question Number 165597 Answers: 0 Comments: 0

prove that Σ_(n=1) ^∞ (( ψ^( (1)) (n))/n^( 2) ) =(7/4) ζ (4) ■ m.n

$p r o v e t h a t$ $\underset{n = 1}{\sum^{\infty}} \frac{ψ^{(1)} (n)}{n^{2}} = \frac{7}{4} ζ (4) ◼ m . n$

Question Number 165581 Answers: 2 Comments: 0

ϕ(t)=∫_0 ^( (π/2)) ( sin(x)+t cos(x))^( 2) dx find the value of the extermum of ϕ (t).

$φ (t) = \int_{0}^{\frac{π}{2}} {(s i n (x) + t c o s (x))}^{2} d x$ $f i n d t h e v a l u e o f t h e e x t e r m u m$ $o f φ (t) .$

Question Number 165574 Answers: 0 Comments: 0

Question Number 165570 Answers: 2 Comments: 0

Question Number 165568 Answers: 0 Comments: 0

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