Resumen the coldest place on earth

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TACNA - PERU

1. dx1+sen2x

dx1+sen2x dx1+1csc2x dxcsc2x+1csc2x csc2xdxcsc2x+1 csc2xdxtg2x+1+1=csc2xdxtg2x+2 tg x=v sec2xdx=dv dvv2+22
12arctanv2
12arctantanx2+c

2. dx6x3-7x2-3x

dx6x3-7x2-3x dxx(6x2-7x-3) dxx3x+1(2x-3)
1x3x+1(2x-3)=Ax+B3x+1+C(2x-3)
1x3x+1(2x-3)=A3x+12x-3+Bx(2x-3)+Cx3x+1x3x+1(2x-3)
1=A3x+12x-3+Bx(2x-3)+Cx3x+1
1=A6x2-7x-3+2Bx2-3Bx+3Cx2+Cx
1=6Ax2-7Ax-3A+2Bx2-3Bx+3Cx2+Cx
0x2+0x+1=x26A+2B+3C+x(-7A-3B+C)-3A
0=6A+2B+3C
0=-7A-3B+C
1=-3A
-13=A
(-1) 0=6A+2B+3C
(3) 0=-7A-3B+C

0=-6A-2B-3C
0=-21A-9B+3C

0=6.13-2B-3C
0=21.13 -9B+3C

0=2-2B
0=7 -9B
0=9-11B 11B=9 B=911

0=6A+2B+3C 0=6.13+2.911+3C 0=2+1811+3C
0=4011+3C

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