Answer :
Is your question d^j * d^k?
If so, then since the variable is the same (d is used in both expressions), then you add the exponents, you don't multiply them.
The correct answer is d^j+k.
If so, then since the variable is the same (d is used in both expressions), then you add the exponents, you don't multiply them.
The correct answer is d^j+k.