00:01
Hi, now we are going to write the formula for the exponential function, pausing through the points minus 3 comma 2 divide by 27 and 1 .6.
00:12
We know that the exponential function is y is equal to a inter b power x.
00:18
Now if i choose x comma y is equal to minus 3 .2 divide by 27, then we have 2 divide by 27 is equal to 2 divide by 27 is equal.
00:30
To a, b, power minus 3 and i label this one as equation number 1.
00:36
And if i choose x comma y is equal to 1 .6, then we have 6 is equal to a, b, power 1.
00:45
And i label this one as equation number 2.
00:48
Now i am going to 2, equation 2 divide by equation 1.
00:53
Then we get a, b power 1 divide by a, b power minus 3, equal to 6 into 27 divided by 2.
01:04
From this we get b power 4 is equal to 3 power 4...