Question

Ap:1,2,3,......,100000 Find sum of ap

Answer 1

Sₙ = n(n+1) / 2

So; S₁₀₀₀₀₀= (100000)(100001)/2

=(100001)(50000)

S₁₀₀₀₀₀=5000050000

Answer 2

Answer:

5000050000

Step-by-step explanation:

n=number of terms

To find the sum of an A.P, the formula is,

n(first term+second term)÷2

Here the number of terms are 100000.

So the answer is 100000(100001)÷2

=5000050000.

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