Question

@Kevin Menemukan istilah 20 dan jumlah dari syarat-syarat pertama 14 kemajuan ini, 2, 5, 8, 11,...?

Answer 1

I think this is the first post in a foreign language LOL

Answer 2

lol, pls use english. I don't understand XD

Answer 3

can you translate it once more:D

Answer 4

Find the 20th term and the sum of the first 14 terms of this progression, 2, 5, 8, 11,.........?

Answer 5

Okay

Answer 6

U DONT speak Indonesian???????????// O.O

Answer 7

*brain explosion*

XD

Answer 8

Given progression, 2, 5, 8, 11,......... is a arithmetic progression

Answer 9

U20 = a + (n - 1)b
U20 =2 + (20 -1)3
U20 = 59

Answer 10

wait

Answer 11

........

Answer 12

Sn= 1/2n (2a + (n-1)b)
S20 = 1/2*20 (2*2 + (20 -1)3)
S20 = 610

Answer 13

am I right :D

Answer 14

Nope. LOL

Answer 15

:o

Answer 16

Here First term (a) = 2

and Common difference (d) = 5 - 2 = 3

We know, nth term can be represented as, an = a + (n - 1)d

and sum of n terms = n2
n2
{2a + (n - 1)d}

To find 20th term of the series

=> a20 = a + 19 d

= 2 + 19 * 3

= 2 + 57

= 59

=> 20th term = 59

Sum of first 14 terms = 142
142
{2 * 2 + (14 - 1) * 3}

= 7{4 + 39}

= 7 * 43

= 301

=> Sum of first 14 terms = 301.

Answer 17

Owh yeah, I input it wrong. lol
Go to another question :D