haileywoodard13 haileywoodard13

27-09-2022
Mathematics

Answered

Use the formula for finding the sum 1+2+3+...+n to discover a formula for finding the sum 5+10+15+...+5n.
The formula for the sum 5+10+15+ + 5n is S=
(Simplify your answer. Use integers or fractions for any numbers in the expression.

Answer :

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