if the difference of an AP is 2, then find a5-a3.(not only answer, i need full step by step) About the author Elliana
Step-by-step explanation: a 3 =a+2d ⟹2=a+2d ⟹a=2−2d a 2 =a+d=2−2d+d=2−d a 4 =a+3d=2−2d+3d=2+d a 5 =a+4d=2−2d+4d=2+2d ∑ i=1 5 a i =a 1 +a 2 +a 3 +a 4 +a 5 =2−2d+2−d+2+d+2+2d =10 Reply
Step-by-step explanation:
a
3
=a+2d
⟹2=a+2d
⟹a=2−2d
a
2
=a+d=2−2d+d=2−d
a
4
=a+3d=2−2d+3d=2+d
a
5
=a+4d=2−2d+4d=2+2d
∑
i=1
5
a
i
=a
1
+a
2
+a
3
+a
4
+a
5
=2−2d+2−d+2+d+2+2d
=10