how would i graph f(x)=-2log(x+5) without using a graphing calculator? how do i find the domain and range? can someone explain it to me clearly. is the domain {x\ x<4}?
2007-11-07 05:41:56 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
arg of log must be positive. so x + 5 > 0
x > -5. (don't know why it is x<4)
For log fn, the range is all real number
base on the graph y = log(x)
shift x 5 unit to left. Then X2 and reflect on x axis
2007-11-07 05:56:34 · answer #1 · answered by norman 7 · 0⤊ 0⤋
the log is not defined for 0 or negative numbers. Hence the domain is -5
the range is 2 > y > - infinity
the graph starts out at just > x = -5 and y just <2, and curves downward crossing the x-axis at x = -4 continues downward crossing the y axis at -1.39794 (which is log 5) and then continues downward forever as x --> infinity
2007-11-07 06:07:43 · answer #2 · answered by ironduke8159 7 · 0⤊ 0⤋