Sagot :
P(x) e ax + b dersek P(x+1) = ax + a + b olur
P(x - 2) = ax -2a + b olur
Bunlarıda 4x + 4 e eşitlememiz gerekiyor. eşitlersek ; P(x+1)+P(x-2) = 4x +4
ise ax + a + b + ax - 2a + b = 4x + 4
ise 2ax - a + 2b = 4x + 4
ozaman 2a =4 a =2 olur.
2b - a = 4 olduğundan
2b - 2 = 4 b = 3 olur
Böylece P(x) = 2x + 3 olur...
p(x)=ax+b
P(x+1)=ax+a+b
P(x-2)=ax-2a+b
P(x+1)+P(x-2)=2ax-a+2b=4x+4
a=2
b=3
P(x)=ax+b=2x+3
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