Question

In an Arithmetic Progression, if d= -4, n=7,an=4, then find a.​

Answer 1

Answer:

a1=28

Step-by-step explanation:

Arithmetic progression:

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

an=a1+(n-1)d

In which a1 is the first term and d is the common difference between consecutive terms.

In this question, we have that:

a7=4, d=-4

We want to find a1. So

an=a1+(n-1)d

4=a1+(7-1)-(-4)

a1=4+24=28

Therefore answer is 28

We have a1=28

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