Express the Sum Using Summation Notation $\sum _ { k = 3 } ^ { 5 } \left( k ^ { 2 } - 8 \right)$

Q70: Find the sum of the arithmetic sequence.<br>--3

Q71: Find the indicated term using the given

Q72: Evaluate the factorial expression.<br>- <span class="ql-formula"

Q73: Write out the sum. Do not

Q74: If the sequence is geometric, find

Q76: If the sequence is geometric, find

Q77: Find the first term, the common difference,

Q78: Write out the first five terms of

Q79: Find the indicated term using the

Q80: Find the indicated term using the given