Diket dF/dx = ax + bF(0) – F(-1) = 5, maka a+b =

F(x) = ax+b
f(0)-f(-1)=5
f(0)=a.0+b
f(-1)=a.-1+b
0+b-(-1+b)=5
0+b+1+b=5
1+2b=5
2b=6
b=3

-1+b= -1+3= 2
jadi a+b=3+2=5
itu jawaban saya 🙂