# Thread: Some math (Statistics) questions?

1. ## Some math (Statistics) questions?

1. a.Predict the sum of the squares of the terms in the nth row of Pascal's triangle.
b.Predict the result of alternately adding and subtracting the squares of the terms in the nth row of pascal's triangle.
Ans: t2n,n
2. Find a relationship btw. entries in number of diagonals in an n-sided polygon.
Ans: n odd:0 n even (-1)^0.5tn,0.5n

2. Originally Posted by hugsandkisses
1. a.Predict the sum of the squares of the terms in the nth row of Pascal's triangle.
b.Predict the result of alternately adding and subtracting the squares of the terms in the nth row of pascal's triangle.
Ans: t2n,n
2. Find a relationship btw. entries in number of diagonals in an n-sided polygon.
Ans: n odd:0 n even (-1)^0.5tn,0.5n
For b. you should look at Pascals Triangle, add up the sum of the squares of the elements in each row and then look for a pattern.

For 2. you should first look at concrete values of n to get a feel for things, starting with n = 4, n = 5 ..... Now look for a pattern.