How do you find f(−1) given f(n)=−3n2−4n?
2 Answers
Aug 3, 2016
Just put -1 in n's place.
Explanation:
f(n)= -3n^2-4n
= -3(-1)^2 - 4(-1)
= -3(1) +4
= -3+4 = 1
Aug 3, 2016
f( -1) = 1
Explanation:
Given f(n) then f(-1) means assign the value -1 to n. That is substitute n = -1 into the function.
f(n)=−3n2−4n
⇒f(−1)=−3(−1)2−4(−1)=−(3×1)−(4×−1)
=−3−(−4)=−3+4=1
