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Let f(x) = x - 3 and q(x) = bx +1. If f(q(1)) = -3, what is b?

MIRB16  Jul 25, 2017
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Let f(x) = x - 3 and q(x) = bx +1. If f(q(1)) = -3, what is b?

 

q(1)  = b(1) + 1

 

f(q(1)) = -3  means  that we have

 

[ b(1) + 1] -  3  = -3

 

b + 1  - 3  =  -3

 

b - 2  =  -3    add 2 to both sides

 

b  = -1

 

 

cool cool cool

CPhill  Jul 25, 2017

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