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8_murik_8 [283]
3 years ago
7

If m(x) = x3 and n(x) = √ 6 + x , find the function value, if possible.

Mathematics
1 answer:
charle [14.2K]3 years ago
3 0

Answer:

The correct answer is option D.  -126  

Step-by-step explanation:

<u>Points to remember</u>

<u>Composite functions</u>

f(x) and g(x) be the functions then,

(f - g)(x) = f(x) - g(x)

<u>To find the value of (m - n)(-5)</u>

Let  m(x) = x³ and n(x) = √ (6 + x)

(m - n)(x) = m(x) - n(x)

 =  x³ - √( 6 + x)

(m - n)(-5) = m(-5) - n(-5)

 =  x³ - √( 6 + x)

 =  (-5)³ - √( 6 + -5)

 = -125 -  √1

 = -125 -1

 = -126

The correct answer is option D.  -126

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