Question

si f es una funcion lineal tal que f(1)= 2 y f(-2)= -1 calcule p=(5)+2f(0)

Answer 1

f(1)=2 => ax+b=2
a(1)+b=2
a+b =2
f(-2)=2 => ax+b=-1
a(-2)+b=-1
-2a+b =-1
•a+b=2 ...(2)
-2a+b=-1
----------------------
2a+2b=4
-2a+b=-1
------------------
3b=3
b=1 ^ a=1

p=5+2f(0)
p=5+2(1(0)+1)
p=5+2(1)
p=7