Question

if u r smart plz.. solve it 50 pojnts​

Answer 1

Answer:

Step-by-step explanation:

200,250 ,300,..... are in ap

a=200 d= 50

Sn= n/2 ( 2a+( n-1 )d)

S17 = 17/2 (2× 200+(17-1)50)

= 17/2 (400+16×50)

= 17/2 (400+800)

17/2 × 1200

17× 600

10200..

Hope it helps you my dear friend

Answer 2

Answer:

Rs 10200 Will be his saving.

Step-by-step explanation:

Total savings = Sum of savings of 17 months

We know,

a = 200 rs

d = 50 rs.

n = 17

Sum of n terms = n/2 (2a + (n -1)d)

S 17 = 17/2 (2 x 200 + 16 x 50)

S 17 = 17/2 ( 1200)

S 17 = 17 x 600

S 17 = rs 10200