Question

Which of the following is the correct expanded form for the series below?

O (7+3•1)+(7 +3-2)+(7 +3,3)+(7+34)
O (7+1)+(7+2)+(7 +3)+(7+4)
O (3-1)+(3-2) +(303)+(3-4)+7
O 3+32 +38 +34 +7

Answer 1

Answer:

A.

Step-by-step explanation:

four terms are needed. 1-4

so that eliminates bottom 2 choices

Answer 2

Answer:

The correct option is A) $(7+3\cdot 1)+(7+3\cdot 2)+(7+3\cdot 3)+(7+3\cdot 4)$.

Step-by-step explanation:

Consider the provided series.

$\sum_{n=1}^{4}(3n+7)$

Substitute the value of n = 1,2,3 and 4 respectively.

$(3\cdot 1+7)+(3\cdot 2+7)+(3\cdot 3+7)+(3\cdot 4+7)$

Which can be written as:

$(7+3\cdot 1)+(7+3\cdot 2)+(7+3\cdot 3)+(7+3\cdot 4)$

Therefore, the correct option is A) $(7+3\cdot 1)+(7+3\cdot 2)+(7+3\cdot 3)+(7+3\cdot 4)$.