For any quadratic function px2 + qx + r the value of θ in Lagrange’s theorem is always:
1
½ (whatever p, q, r, a and h may be)
2
\(\frac{a+h}{2}\) (whatever p, q, r, a and h may be)
3
0 (whatever p, q, r, a and h may be)
4
\(\frac{a-h}{2}\) (whatever p, q, r, a and h may be)