A train moves at a constant speed. The train travels 13
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ANSWER
EXPLANATION
The sum of the first terms of a geometric sequence is given by;
Where , is the number of terms and
is the first term.
When , we have
, we get;
The solutions to f(x) = 64 is x = 7 and x = –7.
Solution:
Given data:
– – – – (1)
– – – – (2)
To find the solutions to f(x) = 64.
Equate equation (1) and (2), we get
Subtract 15 from both sides of the equation.
Taking square root on both sides of the equation, we get
x = ±7
The solutions to f(x) = 64 is x = 7 and x = –7.