- a2 = 8
- a2 =3/5
- a2 =11, a3 =14, a4 =17
Step by step explanation:
1. Solution:
d=An-Ak/n-k
d= A3-A1/3-1
d= 9-7/3-1 =2/2 (divide natin sya) so 1
the common difference is 1
A2 = A1+d
A2 = 7+1 = 8
so the 2nd term is 8
2. Solution:
d= 1/5-1/2-1
d= -4/5/2(divide Naten sya)
d= -2/5
a2 = a1 - 2/5
a2= 3/5
3. Solution:
d= 20-8/5-1
d= 12/4(divide po natin sya)
d= 3
a2 = a1 +d = 11
a3 = a2 +d= 14
a4 = a3 + d = 17
Eto po formula for finding d
d = An-Ak/n-1
Hope this helps !
