What is the domain of the function y = log(x + 3)?

Find the domain of

y = log(x + 3)

Logarithms can only be taken for positive numbers. So you must have

x + 3 > 0

x > – 3          ✔

So the domain of the function is

D = {x ∈ R:  x > – 3}

or using the interval notation

D = (– 3, +∞)

I hope this helps. =)

It is important because sometimes ur dna needs to multiply