McGraw Hill Glencoe Algebra 2, 2012
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McGraw Hill Glencoe Algebra 2, 2012 View details
5. Recursion and Iteration
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Exercise 9 Page 695

Use the initial value as the input of a function rule. This will give us the first output value.

-18, 74, -294

Practice makes perfect
We are asked to write the first three iterates of a function, given a function rule and an initial value.

x_0&=5 f(x)& = -4x+2 To do so, we will use a table.

n x_n f(x)=-4x+2 x_(n+1)
0 x_0= 5 -4 x_0+2=-4( 5)+2 -18
1 x_1= -18 -4 x_1+2=-4( -18)+2 74
2 x_2= 74 -4 x_2+2=-4( 74)+2 -294
3 x_3= -294 - -

Therefore, the first three iterates of the functions are -18, 74 and -294.