Math, asked by chanchal200554, 5 months ago

answer fast guys... ✌

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Answered by rautc157

0

Answer:

S25 = 1375

Step-by-step explanation:

Sn = n/2[2a+(n-1) ×d]

S25 = 25/2[2(7) +(25-1) ×4]

= 25/2[14+24×4]

= 25/2[14+96]

= 25/2[110]

= 2750/2

Ans:- S25 = 1375

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