Recall that the second degree Maclaurin series of the function h {\displaystyle h} has the following form:
T 2 ( x ) = h ( 0 ) + h ′ ( 0 ) x + h ″ ( 0 ) 2 ! x 2 {\displaystyle T_{2}(x)=h(0)+h'(0)x+{\dfrac {h''(0)}{2!}}x^{2}}
