If C(n, r) denotes the number of combination of 'n' things taken 'r' at a time then the expression C(n, r+1) + C(n, r-1) +C(2n, r)=?

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

1/3

step-by-step explanation:

to find this, you can divide 12 by 4 which is 3 or you can multiply 4 until you reach 12 (4x3=12). both should give you 3, meaning theres three times less bananas than there are oranges.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.