Question

please answer this question ​

Answer 1

Answer:

a = -4

L = 29

sn = n/2 (a + l)

150 = n/2 (-4+29)

150 × 2 = 25n

n = 300/25

n = 12

s12 = 6 (-4+(11)d)

150/6 = 11d-4

25 = 11d-4

11d = 29

d = 29/11