Question

In an AP: (i) given a = 5, d = 3, An = 50, find n and the value of Sn.​

Answer 1

Answer:

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Answer 2

Answer:

hii bro

Step-by-step explanation:

An=5+(n-1)d

Putting the value

50=5+(n-1)×3

50=5+3n- 3

50=2+3n

50-2=3n

48/=3n

48/3= n

n=3

Now we ned to find Sn by the thes formula

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

By Putting the values n=16 ,a=5 , and d=30

Sn = 16/2 (2×5+(16-1)×3)

" =16/2(2×5+(15)3)

" =16/2(2×5+45)

" =16/2 (10+45)

" =8×55

" = 440

I hope it will help you