Question

write sigma notation
8-27+64-125+...+(-1)^n n^3=

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

   n

⇒ Σ  $(-1)^i(i^3)$

 i = 2

Step-by-step explanation:

Given :

Write in sigm notation,

⇒ $8 - 27 + 64 - 125 + ... + (-1)^n(n^3)$

Solution :

⇒ $8 - 27 + 64 - 125 + ... + (-1)^n(n^3)$

Usualy the maximum number of terms (limit) is written bove the sigma, and lower limit is written below the sigma,. And the property of the series is usully written right side o the sigma & constant mutiplies like 1 , 2 , 3 , ... Z  are written left to the sigma,.

For this one,.

   n

⇒ Σ  $(-1)^i(i^3)$

 i = 2