Answered

Find the sum of the arithmetic sequence below. show your solution.1.a1=42,an=146,n=142. a1=-4,d=-5,n=203.a1=x,d=2,n=10

Sagot :

MERCYFREOLOGO

Answer:

you continue

in the sum of arithmetic, you have to use the formula ethier

Sn=n/2(a1+an)

Sn=n/2[2a1+(n-1)d]

depends on the given

I hope it can help you :)

Goodluck!

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