Question

given. a=4 d=2 Sn=-4 find n and a​

Answer 1

Answer:

it is expplained

Step-by-step explanation:

An=a+(n-1)d

An=4+(n-1)2

An=4+2n-2

2n=4+2

2n=6

n=6/2

n=3

.... the value of a is already in the question a=4