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Answered by BranilyHaseeNa
4

Answer:

No. of trees in first row (a) = 1

Difference between no. of trees planted in two successive rows (d) = 1

No. of rows (n) = 25

Sn = n/2[2a + (n – 1) d]

∴ S25 = 25/2[2 (1) + (25 – 1) 1]

∴ S25 = 25/2[2 + 24]

∴ S25 = 25/2 (26)

∴ S25 = 25 (13)

∴ S25 = 325

I hope it's helpful to you ❤️❤️

Frnds?

Answered by alishakhan6692
4

Step-by-step explanation:

its your answer if helpful so please mark it as brain list answer

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