Answer:
Step-by-step explanation:
A geometric sequence is a sequence in which the successive terms increase or decrease by a common ratio. The formula for the nth term of a geometric sequence is expressed as follows
Tn = ar^(n - 1)
Where
Tn represents the value of the nth term of the sequence
a represents the first term of the sequence.
n represents the number of terms.
From the information given,
r = 1/3
T3 = - 81
n = 3
Therefore,
- 81 = a× 1/3^(3 - 1)
-81 = a × (1/3)^2
-81 = a/9
a = -81 × 9 = - 729
The exponential equation for this sequence is written as
Tn = - 729 * (1/3)^(n-1)
A)8,atomic number also means proton number
Answer:
x = 60
Step-by-step explanation:
Given
- 7 = 1 ( add 7 to both sides )
= 8 ( square both sides )
( )² = 8² , that is
x + 4 = 64 ( subtract 4 from both sides )
x = 60
Answer:
A) 
Step-by-step explanation:
Answer:
Step-by-step explanation:
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