Assume the statement is true for n= k. Prove that it must be true for n=k+1, therefore proving it true for all natural numbers, n. Hint: Since the total number of dots increases by n each time, prove that d(k) + (k + 1) = d (k+1).​

n

step-by-step explanation:

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.

a natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life.

step-by-step explanation: