Math, asked by amulyasamulyas22, 1 month ago

term of
the
Find the sum of first 20
arithematic progrėstion
the formula
3 ,8, 13
using

Answers

Answered by vanshmalik630

5

Answer:

Sum of n terms =n/2[a+(n-1)]×d

Step-by-step explanation:

S20=20/2(3+19×5)

S20= 10(3+95)

S20=10(98)

S20=980

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