Calculer

/e-'-'x^ dx, I e-^'-^-' ( .r* + i) ^■> dx. ' 0

[Pour la seconde, poser .a;- -|- i ^= t.] 13. Calculer '

/ x'-siuxdx^ I xchxdx, 1 {^^ — .r -l- 4) (sin-^ — cosx)dx, Jq l'a • '

/ xe-^ ?,\ï\^x dx^ / (■^'" — \)e-^ è'in'^x dx.

Va. Calculer

/ X ATQ. l?kx\gx dx, I (x--h i)\ogx dx, I x^x'^-^ 1 \ogx dx,

r"^"" los('n-.r2) , r- 3" + I , / — :— dx, I arc la 11" dx,

f arc sin x dx, j x- arc sin yx- — i dx.