2. Explain why the Ratio Test can or cannot be used to determine whether the series isconvergent.(a)∞Qn=1(−1)n(b)∞Qn=1s in(n)(c)∞Qn=12n+1n2n−1(d)∞Qn=1(n!)2 (2n)!

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

the smallest possible measurement of the width is 14 feet

step-by-step explanation:

let's assume length of parallelogram is 'l'

width of parallelogram is 'w'

the perimeter of a parallelogram must be no less than 40 feet

so, we get

we are given

length of parallelogram is 6 feet

so,

l=6

we can plug it

now, we can solve for w

subtract both sides by 12

divide both sides by 2

and we get

so,

the smallest possible measurement of the width is 14 feet