- Find a+b if the line y=x+4 is tangent to f(x) = ax2 + bx at (2,0)?

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RECEBI MINHA CTPS E USO, E ESSES DIAS TIVE QUE EMITIR SEGUNDA VIA E NÃO CONSEGUI POIS CONSTA QUE AINDA NÃO ME FOI ENTREGUE A 1 O Q FAZER? The initial value problem x dy/dx -4y = 0, y(0)=k, has an infinite number of solutions for k = -? and no solution for k -? What is the patterns of family relations? Math need help solving this long division problem? In the solar interior energy is transferred
A.conduction & convection
B.conduction & radiation
C.radiation & convection
D.radiation alone?