ib math applications sl 2 Exam Questions with
Correct Answers
1. adding exponents correct answer: x^a · x^b = x^(a+b)
2. subtracting exponents correct answer: x^a / x^b = x^(a-b)
3. multiplying exponents correct answer: (x^a)^b = x^(a·b)
4. error (percent error is on the formula packet) correct answer: v(a)-
v(e)
5. how to solve matrices correct answer: 1. rewrite so it is x, y, z
2. 2nd--matrix--edit, add numbers
3. a- coeflcients, b- solutions
4. when solving, put a and b together on the calc and add -1 exponent to a
6. solving intersections correct answer: 1. make equations equal
2. put into y equals
3. trace the intersect
7. depreciation formula correct answer: FV= PV(1+ r/100)^n
8. what do k, n, and r stand for in economic math mean? correct answer: k--
number of times compounded per year
n-- number of
years r- the
interest
9. in economic math for the calculator... correct answer: add extra parenthesis
around the fraction in the formulas
10. parallel correct answer: same slope
11. perpendicular correct answer: opposite reciprocal slope
12. domain and range correct
answer: Domain correct answer: x
values Range correct answer: y values
13. inclusive correct answer: [brackets] part of domain/range/ set
14. exclusive correct answer: (parenthesis) not part of domain/ range/ set; always given for
infinities
15. how to solve an inverse function correct answer: switch x and y, solve for
1/
11
, y
16. set notation correct answer: {x values included} braces
17. for certain questions, it will say degrees or radians... correct
answer: MAKE SURE TO SWITCH THE MODE!!!
18. exponential functions correct answer: y=a^x+C; c is horiz. asymp.; y inter is
(0,1+C)
19. growth function correct answer: y=a^x, a>1
20. decay function correct answer: y=a^x, 0<a<1
21. direct variation function correct answer: y=kx
22. indirect variation correct answer: y=k/x
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Correct Answers
1. adding exponents correct answer: x^a · x^b = x^(a+b)
2. subtracting exponents correct answer: x^a / x^b = x^(a-b)
3. multiplying exponents correct answer: (x^a)^b = x^(a·b)
4. error (percent error is on the formula packet) correct answer: v(a)-
v(e)
5. how to solve matrices correct answer: 1. rewrite so it is x, y, z
2. 2nd--matrix--edit, add numbers
3. a- coeflcients, b- solutions
4. when solving, put a and b together on the calc and add -1 exponent to a
6. solving intersections correct answer: 1. make equations equal
2. put into y equals
3. trace the intersect
7. depreciation formula correct answer: FV= PV(1+ r/100)^n
8. what do k, n, and r stand for in economic math mean? correct answer: k--
number of times compounded per year
n-- number of
years r- the
interest
9. in economic math for the calculator... correct answer: add extra parenthesis
around the fraction in the formulas
10. parallel correct answer: same slope
11. perpendicular correct answer: opposite reciprocal slope
12. domain and range correct
answer: Domain correct answer: x
values Range correct answer: y values
13. inclusive correct answer: [brackets] part of domain/range/ set
14. exclusive correct answer: (parenthesis) not part of domain/ range/ set; always given for
infinities
15. how to solve an inverse function correct answer: switch x and y, solve for
1/
11
, y
16. set notation correct answer: {x values included} braces
17. for certain questions, it will say degrees or radians... correct
answer: MAKE SURE TO SWITCH THE MODE!!!
18. exponential functions correct answer: y=a^x+C; c is horiz. asymp.; y inter is
(0,1+C)
19. growth function correct answer: y=a^x, a>1
20. decay function correct answer: y=a^x, 0<a<1
21. direct variation function correct answer: y=kx
22. indirect variation correct answer: y=k/x
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