You probably won't have marks taken off for this, but it's not correct. If you were to take this approach you'd have to say:
"Since the statement is true for n=k+1, if it is true for n=k, then it is true for n=1, 2, 3, 4, 5... Hence it is true for all integers n>/=1 by mathematical induction."
Because you haven't proven that it is true for n=k. You have only shown that if it is in fact true for n=k, then it is also true for n=k+1. The induction comes into play by first proving it is true for n=1, which then implies it must be true for all integers that follow as in this case k=1.