fma() [17/17]

template<typename T1 , typename T2 , typename T3 , require_any_matrix_t< T1, T2, T3 > * = nullptr, require_var_t< return_type_t< T1, T2, T3 > > * = nullptr>

auto stan::math::fma ( const T1 &  x, const T2 &  y, const T3 &  z  )

inline

The fused multiply-add function for three variables (C99).

This function returns the product of the first two arguments plus the third argument.

The partial derivatives are

\(\frac{\partial}{\partial x} (x * y) + z = y\), and

\(\frac{\partial}{\partial y} (x * y) + z = x\), and

\(\frac{\partial}{\partial z} (x * y) + z = 1\).

Parameters

x	First multiplicand.
y	Second multiplicand.
z	Summand.

Returns

Product of the multiplicands plus the summand, ($a * $b) + $c.

Definition at line 388 of file fma.hpp.