Help please and I only need help on 3 and also explain your reasoning!!!!!! If you don’t you already know what’s gonna happen! T
hanks!
2 answers:
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Answer:
Step-by-step explanation:
Subtract
6 u from 2 u .
− 4 u + 9 = 19
Move all terms not containing u to the right side of the equation.
− 4 u = 10
Divide each term by − 4 and simplify.
u
=
−
The result can be shown in multiple forms.
Exact Form:
u
=
−
Decimal Form:
u =− 2.5
Mixed Number Form:
u
=
− 2
The sequence is arithmetic, so there is a constant difference d between consecutive terms such that
and so on, down to
(notice the pattern of 100 = 99 + 1 = 98 + 2 = 97 + 3 = … = 1 + 99)
Solve for d :
Now, the sum of the first 100 terms of this sequence is
which follows from the well-known sums