## Answers

Given P(x)=x r14-02 of this bar To find mass over b OSX<3 bar Hin m={pcxida 1 Mass of 3 3 M=S S 2114-X dre (514-7²dx- 0 Let 14-0² и by differentiating an) 0-2x 2-7 dx=du nxn-1 -2x dx = du .du -:x dx = 2 14 Cimits: cower limit: x=o su= 14-0= upper limit: x=3 =) u= 14-(3) 2= 14-9 iu=15 plug in all above values in ✓ in ea ☺ 5 5 u z du mass, m=s ru (-4) - 2 14 14 - Sxndx= -XnIT % +1 +C nti u ولا +1 14 - 3/2 (14) ( 15 ) 14 + (3) [42] = 1 / ima (14174 - 565 CS Scanned with CamScanner

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