​Find f(a), f(a + h), and the difference quotient f(a + h) − f(a

Algebra
Tutor: None Selected Time limit: 1 Day

Find f(a), f(a + h), and the difference quotient f(a + h) − f(a)h

, where h ≠ 0.

f(x) = 3 − 2x + 4x2

f(a) =  

Correct: Your answer is correct.

f(a + h) =  

Correct: Your answer is correct.

????HELP   f(a + h) − f(a)/h =  

Feb 7th, 2015

f(x) = 3 − 2x + 4x^2

f(a+h) = 3 - 2(a+h) + 4(a+h)^2 = 3 - 2a -2h +4a^2+8ah+4h^2
f(a) = 3 - 2a + 4a^2

[f(a+h) - f(a)]/h = [3 - 2a -2h +4a^2+8ah+4h^2 - (3 - 2a + 4a^2)]/h
=[3 - 2a -2h +4a^2+8ah+4h^2 - 3 + 2a - 4a^2)]/h
= [-2h + 8ah + 4h^2]/h
= 4h + 8a -2


Feb 7th, 2015

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