1.

`lim_(x->0)(sin3x+7x)/(4x+sin2x)`

Answer» `lim_(xto0)((sin3x+7x)/(4x+sin2x))=lim_(xto0)(((sin3x)/(x)+7)/(4+(sin2x)/(x))) " "["dividing num. and denom. by x"]`
`=lim_(xto0){((sin3x)/(3x).3+7)/(4+((sin2x)/(2x)).2)}=([3xxlim_(3xto0)(sin3x)/(3x)]+7)/(4+[2xxlim_(2xto0)((sin2x)/(2x))])`
`=((3xx1)+7)/(4+(2xx1))=10/6=5/3.`


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