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I need to know how to solve this equation
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1 vote
I need to know how to solve this equation

I need to know how to solve this equation-example-1
User Zishan Mohsin
by
8.6k points

1 Answer

6 votes

Answer:

270

Explanation:


\sum_(j=3)^(40)(5+2j)=\sum_(j=3)^(40)(5)+\sum_(j=3)^(40)(2j)


=[(40-3+1)(5)]+[2(3+4+5+...+40)]


=190+2(U_1+(n-1)d)


=190+2(3+(40-3)(1))


=270

User Alen Oblak
by
8.0k points
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