Respuestas

2012-12-04T22:40:49+01:00

f(x)=x²+1 ,  g(x)=x²+5 determinar

a)(fog)(x)=(x²+5)²+1=x4+10x2+25+1=x4+10x2+26

 

b)(fog)(4)=x4+10x2+26=(4)4+10(4)2+26=256+160+26=442

 

c)(gof)(x)=(x²+1)²+5 = x4+2x2+1+5=x4+2x2+6

 

d)(gof)(4)=x4+2x2+6=(4)4+2(4)2+6=256+32+6=294