What's the output of a system modeled by the function ƒ(x) = x5 – x4 + 9 at x = 2?
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Geometric series are in the form of
Where a is the first term and r is the common ratio .
And it is given that
r=-3,2
So the first five terms are
= 2-6+18-54+162 or 2+4+8+16+32
= 122 or 62