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val452
21.01.2020 •
Mathematics
If f(x) = 3x2 + 1 and g(x) = 1 – x, what is the value of (f – g)(2)?
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Ответ:
3x^2+1-1+x
x=2
3 (2)^2+1-1+2
3×4+1-1+2
12+1-1+2
13-1+2
12+2
14
Ответ:
g(x) = 1-x
(f - g)(2)
3x^2 + 1 -(1 - x)
3x^2 + 1 - 1 + x
3x^2 + x
3(2)^2 + 2
3(4) + 2
12 + 2 = 14
Ответ:
Equation to determine the lengths of Aseem's and Stana's cars is:
1. 2x − 5 + x = 20
Step-by-step explanation:
Let length of Aseem's car= x
Stana's car is 5 less than 2 times the length of Aseem's car.
i.e. Length of Stana's car= 2x-5
The sum of the lengths of both cars is 20 inches.
i.e. 2x-5+x= 20
Hence, equation to determine the lengths of Aseem's and Stana's cars is:
1. 2x − 5 + x = 20