In an Arithmetic Progression, if d = -4, n = 7, an = 4, then find a1

Step-by-step explanation:

Arithmetic progression:

The nth term of an arithmetic progression is given by the following equation:

In which is the first term and d is the common difference between consecutive terms.

In this question, we have that:

We want to find . So

We have that

sum= when you add is how much the whole amount is

distance= when you use angles and it means how far it goes

step-by-step explanation:

3 qrs + 3/2 xy hope this : /

step-by-step explanation: