Answer: B) 46
Step-by-step explanation:
The summation of 3i + 1 from i = 2 to i = 5 can be calculated by finding the value of each term and then adding them up ... or.... using the formula:
i = 2: 3(2) + 1 = 7
i = 3: 3(3) + 1 = 10
i = 4: 3(4) + 1 = 13
i = 5: 3(5) + 1 = 16
TOTAL = 46
[tex]\text{Equation: }\dfrac{a_1+a_5}{2}\times n\\\\.\qquad =\dfrac{7+16}{2}\times 4\\\\.\qquad =23\times 2\\\\.\qquad =46[/tex]
