Question

5 marks question
long answer type

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Answer 1

Here is your answer in the attachment given above

Answer 2

.•♫•♬•[ welcome to the concept of arithmetic series ].•♫•♬•

✨concept :

arithmetic series sum

✨solution :

for first ap

a = 8

d = 20

for second ap

a=-30

d = 8

⏩yr answer is n = 11

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