The modeling of radiowave propagation in the troposphere often involves field-strength calculations in very large domains, for which the usual parabolic equation techniques become prohibitively ...

Substitute each value of 𝒙 to find the 𝒚 values using the equation 𝒚 = 𝒙². This means that 𝒙 is multiplied by itself. (-3)² = 9, (-2)² = 4, (-1)² = 1, 0² = 0, 1² = 1, 2² = 4 ...