Question

if s=246 ,a=4 and d=3 find n if s=n÷2{2a+[n-1]d}​

Answer 1

Answer:

24.6

Step-by-step explanation:

246=n/2[2*4+(n-1)3]

492=n(8+3n-3)

492=n*5+3n

492/5=4n

492/5*4=n

n=24.6