Question

in an AP, if d=-4,a=28,an=4,then n=​

Answer 1

Answer:

7

Step-by-step explanation:

Formula for an= a+(n-1)d

hence 4=28+(n-1)(-4)

-24=(n-1)(-4)

6=n-1

n=7

hope you got it..

Answer 2

Answer:

we know the formula an= a+(n-1)d

given an=4 a=28 d= -4

so 4 = 28+(n-1)(-4)

-24=4-4n

4n=28

n=7