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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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402 Answers<br />

b) /'(!)= lim 1^15^= lim^_ ==00; c) /'-<br />

Ax<br />

= lim<br />

= lim l s<strong>in</strong>Axl<br />

r<br />

,<br />

2fe+l<br />

2<br />

\\<br />

* + A *JL ~ I<br />

=1. 368. 5x 4<br />

'= lim L^iJLJ=-l;<br />

s<strong>in</strong> Ax | ,. r , , /2*-fl<br />

12x 2 + 2. 369. l + 2x 2x 8 . 370.<br />

A*->+o Ax 3<br />

1 5x2 6ax5 ji<br />

371. . 372. mat m - l + b(m-\-n)t rn + n - 1<br />

. 373. 374. T .<br />

375.<br />

-JL<br />

'<br />

2x 5x<br />

8 1 i JL<br />

2<br />

3x- 4 . 376. -* x 9 . H<strong>in</strong>t. y = x zx* = x 8 . 377.<br />

wy X<br />

, ,<br />

2<br />

3x<br />

l/x<br />

. U*U.<br />

(c + dx)<br />

.<br />

o*7A<br />

379. OIS7.<br />

9y2 ^A fW-4-9ft VJA -7- z-o<br />

!<br />

.<br />

on<br />

380. OOU.<br />

1<br />

* 4*- **<br />

2<br />

(x 2<br />

5x + 5) 2<br />

x 2<br />

(2x I) 2<br />

1.<br />

l<br />

. r^ 7= 2. 382. 5 cos x 3 s<strong>in</strong>x. 383. - . 384.<br />

2 2<br />

Y 2 (1 V 2) s<strong>in</strong> 2x (s<strong>in</strong>x cos x)<br />

385. / 2 s<strong>in</strong>/. 386. = y' 0. 387. cot x . ^- s<strong>in</strong> 2 x '<br />

388. arcs<strong>in</strong>x-f-<br />

*<br />

j/~i<br />

X 2<br />

"<br />

y O *>y* v 5<br />

389. x arc tan x. 390. xV(x-f-7). 391. xex . 392. e x ^f-. 393. x .<br />

394. e* (cos x s<strong>in</strong> x). 395. x 2 e x . 396. e x 1<br />

/^arc s<strong>in</strong> x+<br />

^ . 397. * \ K 1<br />

(21n *~ 1)<br />

x2/<br />

In<br />

.<br />

2 x<br />

398. 3x 2 lnx. 399. 1+1H/-A.400. x x ^1 1 . 401. s<strong>in</strong>h x + x coshx.<br />

2<br />

x 2 x In 10 x<br />

402 toco.h^dnh* cosh<br />

403 _ tanh2x 4()4 -3(xln* + s<strong>in</strong>h*cosM<br />

2 x xln 2 xsmh 2 x<br />

2x 2<br />

1 1<br />

arc; 405. . 406. s<strong>in</strong>h x arc s<strong>in</strong> -f- y.<br />

x y x*\ arc coshx 1 -|-2x arc tanhx 3a fax + b \ 2<br />

407. . . ....<br />

,<br />

x 2 Vx2 l (1x 2 2 c<br />

)<br />

fax-}-b\ 2<br />

I I .<br />

\ c /<br />

411. 12fl6+18^ 2<br />

//. 412. 16x(3 + 2x 2 8<br />

.<br />

) 413. . 414. .<br />

(2x I) 8<br />

/I x 2<br />

41B .<br />

fex2 - 416. -.1/j/l;-!. 418.<br />

1-tan 2 x + tan 4 >X<br />

x<br />

8 2<br />

)<br />

f X<br />

^ COS 2 X<br />

419.<br />

"~ *<br />

420. 2 15 cos 2 x s<strong>in</strong>x. 421.^^^--- .H<strong>in</strong>t. x = s<strong>in</strong>- 2 2 s<strong>in</strong><br />

1 +<br />

2 x V cot x s<strong>in</strong> 8 2/<br />

422.<br />

s<strong>in</strong> *<br />

(1 3cosx) 3<br />

423><br />

s<strong>in</strong>> ^<br />

424><br />

3 cos x + 2 s<strong>in</strong>x<br />

cos*x 2 V^lSs<strong>in</strong>x lOcosx<br />

1<br />

425. _2cos^ Ss<strong>in</strong>^^ ^ cos 4 x 2 1^1 x2 '<br />

>^1-|- arc s<strong>in</strong>x<br />

427. L _3jari!*)l > ^<br />

2(l+Jt !<br />

' '<br />

)V^arctanjc /"l x*<br />

(1 + x 2<br />

2<br />

) (arc tan x)

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