- #1
chris40256
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Homework Statement
1. Let f be the function defined by f(x) = -2 + ln(x^2).
a) For what real numbers x is f defined
b) Find the zeros of f
c) Write an equation for the line tangent to the graph of f at x=1
Homework Equations
The Attempt at a Solution
a) all positive reals except 0 ( i believe)
b) Teacher let's us use calculator so : 2.718 , -2.718 (no hurt in checking that)
c)at x = 1 , y = -2
Finding slope/derivative:
0+ (1/x^2)(2x)
2x/(x^2)
plug 1 in for the slope: 2(1) / (1)^2
m= 2
Equation: y+2 = 2(x-1) (i believe its correct but I'm not sure)