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What is the value of (vecA+vecB)? if vec...

What is the value of `(vecA+vecB)?` if `vecA` = `8 hati + 4 hatj ` ` vecB` = `2 hati + 8 hatj `

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The correct Answer is:
`((7L^(3))/12+rho_(0)L/2+(kL^(2))/8)A`
`M_(1)=underset(0)overset(L//2)(int)A(rho_(0)+kx)dx=(rho_(0) L/2+(kL^(2))/8)A`
`M_(2)=underset(L//2)overset(L)(int)A(2x^(2)dx)=2/3[L^(3)-L^(3)/8]=(14L^(3))/24 A`
`M_("total")=M_(1)+M_(2)=((14L^(3))/24+rho_(0)L/2+(kL^(2))/8)A`
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