Answer: Step-by-step explanation: First term = a =4 Common difference = d = 2nd term – first term d = 8 – 4 = 4 Last term = l = 400 First we have to fin the number of terms ‘n’ l = a + (n-1)d 4 + (n-1)*4 = 400 4 + 4n- 4 = 400 4n = 400 {Divide both sides by 4} n = 400/4 n = 100 [tex]S_{n}=\frac{n}{2}(a + l)\\\\ = \frac{100}{2}*(4+400)\\\\=50 * 404\\\\= 20200[/tex] Log in to Reply

Answer: 20200 Step-by-step explanation: a=1 × 4=4 a=2 × 4=8 a=3 × 4=12 a = 4 × 4 = 16 400 = 4 + ( n – 1 ) 4] 400 = 4 + 4n – 4 4n = 400 400 / 4n n = 100 100 / 2 [ 4 + 400 ] 50 [ 404 ] 50 × 404 = 20200 Hope this answer helps you 🙂 Have a great day Mark brainliest Log in to Reply

Answer:Step-by-step explanation:First term = a =4

Common difference = d = 2nd term – first term

d = 8 – 4 = 4

Last term = l = 400

First we have to fin the number of terms ‘n’

l = a + (n-1)d

4 + (n-1)*4 = 400

4 + 4n- 4 = 400

4n = 400 {

Divide both sides by 4}n = 400/4

n = 100[tex]S_{n}=\frac{n}{2}(a + l)\\\\ = \frac{100}{2}*(4+400)\\\\=50 * 404\\\\= 20200[/tex]

Answer:20200

Step-by-step explanation:a=1 × 4=4

a=2 × 4=8

a=3 × 4=12

a = 4 × 4 = 16

400 = 4 + ( n – 1 ) 4]

400 = 4 + 4n – 4

4n = 400

400 / 4n

n = 100

100 / 2 [ 4 + 400 ]

50 [ 404 ]

50 × 404

= 20200

Hope this answer helps you 🙂Have a great dayMark brainliest