Question 1075525
start with an=a1+(n-1)d
a5=a1+4d=22
a15=a1+14d=62
Therefore, subtracting
-10d=-40
d=4
a5=22=a1+16
a1=6
6,10,14,18,22,a10 is 42, a15 is 62.
an=6+(n-1)*4