Here are the first five terms of the sequence 0 2 6 12 20
find an expression, in terms of n, for the nth term of this sequence

Step-by-step explanation:

Given

the nth term of the sequence 0,2,6,12,20 can be expressed as

There is a pattern for the sequence 2,4,6,8,10….. So in this case the nth term will be 2 n

Now n = 0 1 2 3 4

So n(n + 1)/2 = 1,3,6,10,15

We can see from this the required sequence is double the one which is nth term. Therefore the nth term for the sequence will be 2 n (n + 1) / 2 = n(n + 1).

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: