Find the derivative of ( 6⋅6t+3⋅3t ).
a) ( 6tln(6)+3tln(3) )
b) ( 6tln(36)+3tln(9) )
c) ( 6{t+1}ln(6)+3{t+1}ln(3) )
d) ( 6{t-1}ln(6)+3{t-1}ln(3) )