:-

f ' (x) = 24 e^(4x)

f ' (0) = 24 = m , the gradient at point (0,6)

y - 6 = 24 x

y = 24x + 6

f(0)=6

f'(x)=24e^(4x)--->f'(0)=24

Tangent

y=24x+6