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Exercițiile 15, 16, 17, 18.

Exercițiile 15 16 17 18 class=

Răspuns :

15)E(x)=(x+1)²-|x+1|  E(0)=1²-|1|=1-1=0     E(-1)=(-1+1)²-|-1+1|=0²-0=0-0=0
16)E(x)=(1-x)^1001+(x-1)^1001  E(2)=(1-2)^1001+(2-1)^1001=(-1)^1001+1^1001=-1+1=0
 17)E(x)=x^4+3x^2-5  E(√5)=(√5)^4+3*(√5)^2-5=25+15-5=35
18)E(x)=x²+x+√2(2√3+1)       E(√3-√2)=(√3-√2)²+√3-√2+√2(2√3+1)=3+2-2√6+√3-√2+2√6+√2=5√3