Mark M. answered 10/29/19
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Mathematics Teacher - NCLB Highly Qualified
Sn = (n/2)(a1 + an) Learn this formula
S100 = (100/2)(15 + 307)
Can you complete and answer?
Grace G.
asked 10/29/19find the sum of the first 100 terms of the arithmetic sequence
a1=15 and a100=307
Mark M. answered 10/29/19
Mathematics Teacher - NCLB Highly Qualified
Sn = (n/2)(a1 + an) Learn this formula
S100 = (100/2)(15 + 307)
Can you complete and answer?
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