f(x)=4cos(x)−ex, p0=π4, p1=π2
pk+1=pk−f(pk)pk−pk−1f(pk)−f(pk−1), k=1,2,3,...,n
k=1 icin
p2=p1−f(p1)p1−p0f(p1)−f(p0)=π2−f(π2)π2−π4f(π2)−f(π4)=0.870026
k=2 icin
p3=p2−f(p2)p2−p1f(p2)−f(p1)=0.870026−f(0.870026)0.870026−π2f(0.870026)−f(π2)=0.898545
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