If f(n) = 2n^2 + 2 and g(n) = n + 1, what is (f -g)(n) when n = -1?

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02-06-2022
Mathematics

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If f(n) = 2n^2 + 2 and g(n) = n + 1, what is (f -g)(n) when n = -1?

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yxzdxn yxzdxn · Answer 1 · 2022-06-02T20:33:40+02:00

yxzdxn yxzdxn

02-06-2022

the easiest way is to first subtract them first and then replace n with -1:
2n^2+2-n-1 => 2n^2-n+1
now we replace n with -1
2(-1)^2-(-1)+1 => 2+2=4
"4" is teh final answer

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