Math, asked by abishekrajesh995, 1 year ago

what is the formula for a)

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Answered by sarvagnya3456

0

FORMULA :

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

Answered by vanshikauppal2005

0

Step-by-step explanation:

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

S10 =10/2[2×2+(10-1)4]

= 5 [4+9×4]

=5 (4+36)

=5×40

S10 = 200

Hope it helps u

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