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22 votes
22 votes
PLEASE HURRY!!

Find f(-2) for f(x)=5*3^x

A: 1/45
B: -30
C: -45
D: 5/9

User Carlos Daniel
by
2.5k points

2 Answers

5 votes
5 votes

  • We have to find the value of f(-2)


\mapsto \: f(x) = {5.3}^(x)

  • Put x=-2


\mapsto \: f( - 2) = {5.3}^( - 2)


\mapsto \: f( - 2) = 5 * \frac{1}{ {3}^(2) }


\mapsto \: f( - 2) = (5)/(9) = 0.5555..... \: or \: 0.56

User Garyh
by
2.5k points
21 votes
21 votes

Answer:

5/9

Explanation:

f(x)=5*3^x

Let x = -2

f(-2)=5*3^-2

= 5 * 1/3^2

= 5 * 1/9

= 5/9

User Zack Lee
by
3.0k points