SOLUTION: Graph y1=6^3x+1 and y2=215 find the point of intersection. I know y = 215 but how do I find X? Solve this as a logarithm.

Question 945924: Graph y1=6^3x+1 and y2=215 find the point of intersection. I know y = 215 but how do I find X? Solve this as a logarithm.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Graph y1=6^3x+1 and y2=215 find the point of intersection. I know y = 215
:
a graphing table to plot this:
x | y
-------
0 | 2
.2 | 3.9
.4 | 9.6
.6 | 26
.8 | 74.7
1.0| 217, exceeds 215
looks like this

:
find out what x is when y = 215

Subtract 1 from both sides

log equiv of exponents

3x =
using the calc
3x = 2.9948
x =
x = .99827, almost 1, agrees with the graph

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