Let f(x)=2x^2+x-3 and g(x)=x-1. Perform the indicated operation then find the domain. (f*g)(x)
a.2x^3-x^2-4x+3; domain:all real numbers
b.2x^3+x^2-3x; domain: all real numbers
c.2x^3+x^2+4x-3; domain: negative real numbers
d.2x^3+x-3x+3; domain: positive real numbers
1. D
2. A
3. D
4. B
5. B
6. D
7. D
8. A
9. C
10. B
Thanks you guys! Remember, it's only cheating if you're caught.
instead of the multiple choice answers, which i assume they switch around, here are the full answers
1. 2x²-2; domain: all real numbers
2. 2x³-x²-4x+3; domain: all real numbers
3. 2x+3; all real numbers except x=1
4. 8
5. 8
6.104
7. 4a²+4
8. 0
9. 2
10. 8
Function Operations Practice test
d
a
d
b
b
d
c
a
c
b
The answers to the quick check are below. (And if they don't match up, or you're just not sure, you can use mathway!)
1. D) x - 11
2. B) -3x + 9
3. C) -30x² + 28x - 6; all real numbers
4. D) x - 4; all real numbers except x ≠ -4
5. C) It doesn't matter which discount s applied first, the result is the same.
coronavirus is right
f(x) = 2x^2+x-3
g(x) = x - 1
(f*g)(x) = f(x)*g(x) = (2x^2 + x - 3)*(x - 1)
= 2x^3 + x^2 - 3x - 2x^2 - x + 3
= 2x^3 - x^2 - 4x + 3
All real numbers can be plugged into this function, so its domain is that of all real numbers.
And I'm just gonna put the answers I had for the practice as well.
1. D) 2x^2 - 2; domain: all real numbers
2. A) 2x^3 - x^2 - 4x + 3; domain: all real numbers
3. A) 12x^2 + 2
4. D) x - 6
5. B) 8
6. D) 104
7. D) 4a^2 + 4
8. A) 0
9. C) 2
10. B) 8
Thank you so much Sus for putting the answers instead of the letters. All are 100% correct!!!!
3 is actually 12x^2+2 and 4 is actually x-6.
Tea is 100% correct!!!!!
sus & corona are right
I am I the only one seeing that @Corona virus named themself days before quarantine, back when we made all the jokes about it and now we are all still in a pandemic... when they picked that name they never knew what was coming.
Also 3, 4, and 7 are wrong, so yay!!!
corona virus is correct, all answers are correct.
Corona virus still has the right answers for 2022, y’all :)
2 and 7 were wong for me
for 2 the answer was 2x^3-x^2-4x+3; domain all real numbers
for 7 the answer was 4a^2+4
(:
corona virus is correct 100% for functions operations practice in fIca
You are all life savers. No one is going to use ANY of this stuff, im sure even mathmetitions would find this useless.
It's 2023 and sis and tea are correct! Thank you!
SUS is 100% thank you so much!!!
Sus 100% thank ls yall
everything is right on 2/16/23 for the practice test except for 3 and 4
3. 2x+3; domain: all real numbers except x=1
4. 8