Question

-1 +22 - 32 +42 – 52 +...+(-1)" 12. (-1)" n(n + 1 2​

Answer 1

Answer:

Algebra Solver

Step by Step Solution · 2,12,22,32,42,52,62,72 · Find the difference between the members · General Form: an=a1+(n-1)d · an=2+(n-1)10 · Sum of finite

Answer 2

Answer:

-22

in 12 what is value of n

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