Evaluate the Sum $$\sum _ { k = 1 } ^ { 400 } 7$$

Q56: Find the sum.​ <span class="ql-formula"

Q57: Select the first five terms of

Q58: Write an expression for the apparent

Q59: Use sigma notation to write the

Q60: Write the first five terms of

Q62: Write the first five terms of

Q63: Find the indicated term of the

Q64: Write an expression for the apparent

Q65: Find the sum of the infinite

Q66: Write the first five terms of