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 day
Mark brainliest