f(x)= x³+3x hitunglah f(1/4) dan f(π)

f(x) = x³ + 3x = x(x² + 3)
Maka , f(1/4) = 1/4(1/4² + 3) = 1/4(1/16 + 3) = 1/4(1/16 + 48/16) = 1/4(49/16) = 49/64
f(π) = π³ + 3π