29.01.2013 Views

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

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

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

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

118 Indef<strong>in</strong>ite Integrals [C/i. 4<br />

1231 -<br />

JisFr**-<br />

1232. Je*s<strong>in</strong>xdx.<br />

1233. $3*cosjtdx.<br />

1234 '<br />

\ eax *mb* dx -<br />

'235. $s<strong>in</strong>(lnx)dx.<br />

Apply<strong>in</strong>g various methods, f<strong>in</strong>d the follow<strong>in</strong>g <strong>in</strong>tegrals:<br />

1236. (x*e~* 2<br />

1237. \e v<br />

dx. 1246.<br />

J V\-x<br />

*dx. 1247. f jttan 2<br />

2*d;t.<br />

1238. (x 2 -2x + 3)\nxdx. 1248.<br />

1239. ^x\n~dx.<br />

1240. f^dx.<br />

1249. J cos 2<br />

1250**,<br />

1241. fllL^d*. 1251*.<br />

2<br />

1242. f jc arctan3jcdA:. 1252*.<br />

2<br />

:<br />

-|<br />

(In x)dx.<br />

a 2 2<br />

)<br />

'<br />

2<br />

1243. { x (arc tan A:) dx. 1253*. ^ 1//1 -4- x z<br />

dx.<br />

j j<br />

2<br />

1 244. ( (arc s<strong>in</strong> jc) dx. \ 254*. f -4^- .<br />

*n/ir fare s<strong>in</strong> x ,<br />

1245. \ 5 ^.<br />

^ 2<br />

J<br />

Sec. 4. Standard Integrals Conta<strong>in</strong><strong>in</strong>g a Quadratic Tr<strong>in</strong>omial<br />

1. Integrals of the form<br />

f mx + n .<br />

\ 2-7-7 7dx.<br />

J<br />

The pr<strong>in</strong>cipal calculation procedure is to reduce the quadratic<br />

the form<br />

tr<strong>in</strong>omial to<br />

ax z + bx + c = a(x-}-k) z<br />

-{-l, (1)<br />

where k and / are constants. To perform the transformations <strong>in</strong> (1), it is<br />

best to take the perfect square out of the quadratic tr<strong>in</strong>omial. The follow<strong>in</strong>g<br />

substitution may also be used:<br />

If m=0, then, reduc<strong>in</strong>g the quadratic tr<strong>in</strong>omial to the form (1), we get<br />

the tabular <strong>in</strong>tegrals III or IV (see Table).

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!