9.
Let S(k) =,1 +3 + 5 + ..... + (2k - 1) = 3 + k$^2$. Then which of the following is true ?
A:
S(1) is correct
B:
S(k) $\implies$ S(k+1)
C:
S(k) $\neq$ > S(k+1)
D:
Principle of Mathematical Induction can be used to prove the formula for S(k)
The answer is:
B
