Question

Heya guys✌



Give a answer to my question!
Answer the 10th one.

Answer 1

Answer:

Step-by-step explanation:

Answer 2

A = 25

An = -17

Sn = 132

An = a + (n-1) × d

-17 = 25 + (n-1) × d

(n-1) × d = 25+17

(n-1) × d = 42 ------ {equation 1}

Sn = n/2 [ 2a + (n-1) × d ]

From equation 1 ⤵

132 = n/2 [ 2(25) + 42 ]

132×2 = n (50 - 42)

264 = n × 8

n = 264 / 8

n = 33