Some differentiation rules to be remembered and used. It includes the constant rule, the power rule, constant multiple rules, sum rule, and the difference rule. The constant rule: This is simple. f (x) = 5 is the horizontal line with a slope value of zero, and therefore its derivative is also known to be zero. For applying basic differentiation, you need to have clarity regarding constant multiple rules, power rule, difference rule, and the sum rule. With this clarity, you will go for it correctly and confidently.