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Help 4,5

 May 16, 2018
 #1
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4.    5^(3x)  = 900      take the log of both sides

 

log 5^(3x)   = log 900

 

3x * log (5)  = log (900)

 

x =  log (900)  / [ 3 * log (5) ]  ≈  1.41

 

 

5.  f  =x^2 + 5        g  =   [ x + 5 ] / x          f ° g  (-3)  =  f [ g(-3) ]

 

g(-3)  =  [ -3 + 5 ] / -3  =   -2/3

 

f (-2/3)  =   (-2/3)^2  + 5  =   5 + 4/9  =  49 / 9

 

 

 

cool cool cool

 May 16, 2018

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