If s(x) = 2 - x² and t(x) = 3x, which value is equivalent to (s*t)(-7)?

Solution:

Given, functions are s(x) = 2 - x²

t(x) = 3x

We have to find the value equivalent to (s*t)(-7).

(s*t) =[ 2 - x² ] . 3x

= 6x -  3x³ 

Put x = -7 in the above expression,

(s*t)(-7) = 6(-7) -  3(-7)³ 

= -42 +1029

= 987

Therefore, the value of (s*f)(-7) is 987.

If s(x) = 2 - x² and t(x) = 3x, which value is equivalent to (s*t)(-7)?

Summary:

If s(x) = 2 - x² and f(x) = 3x, the value equivalent to (s*f)(-7) is 987.