Question

What’s the answer please?

Answer 1

arithmetic sequence, a1+(n-1)d
22/25+(5-1)*-1/25=22/25-4/25=[18/25]
check for n=3 is 4/5
22/25+(3-1)*-1/25
22/25+2/25=22/25-2/25=20/25=4/5
so it works

Answer 2

The answer should be 18/25