d/dx (u + v) = du/dx + dv/dx
essentially this means that if you are finding the derivative of two functions u and v that you can find the derivative of each function separately and then add the derived functions to get the answer.
it is ambot
The rule to decide if a number is divisible by 9 is to look at the sum of the digits. If the sum of the digits is divisible by 9, then so is the number.
a rule that is used to help balance equations (used in chemistry)
Is the sum of the digits a multiple of 9?
The sum is positive.
The sum of all (interior) angles must equal 360 degrees
It isthe number must end in 0 or 5, andthe sum of the digits (and the sum of the digits of that sum and so on), must be 9.
i have no idea but i really need to know too
It is even and the sum of its digits is divisible by 9.
The total sum of the digits has to equal nine.
The sum of the digits in odd position minus the sum of the digits in even position is divisible by 11.
If the sum of the digits is divisible by 3, the number is also.