Question

Arithmetic series HELP PLEASE

Answer 1

Put the value of n from 1 to 50 in 4n-1

Answer 2

5050

Explanation:

∑_{n=1 to 50} (4n-1)

a1=4×1-1=3

a2=4×2-1=7

a3=4×3-1=11

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a50=4×50-1=199

n=50

Sn=n/2(a1+an)

S50=50/2(3+199)=50/2×202=50×101=5050