Math Is Fun Forum

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

mcq help for final exams

question:1   f(x)=(x^2)-(9)/(x-3) is discontinuiting at x=3 because ??
question:2   [i j j]=??
question:3   THe Value of k.i*j=???
question:4    Commutative LAw Hold in??
question:5     u*(v.w) are??
question:6     If y=f(x) is a differentiable function,then differential of x is defined by relation ???
question:7    the slope of tangent line to y=f(x) at (x1,y1)is???
question:8    the ration in which y axis divide the line joining (2,-3)and (-5,6)is ??
question:9   ax+by+c will represent eq of straight line parallel to y axis if??
question 10  the angle between vectors 2i+3j+k and 2i-j-k is ??

---

Malik

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: mcq help for final exams

I did  not get get question 2?? When Square brackets are put beside a no. , it means the GIF(greatest integar function) of the number. What do you mean here?

I did not get question 3 too.

Did not get question 5 again.

Question 7: It depends on the function of x.

Question 10:No,again did not get it.

What are the values of i and j in each question?

Last edited by iamaditya (2017-03-30 18:57:37)

---

Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: mcq help for final exams

Hi;

question 1 Check the denominator, what happens when x = 3?

question 2 Have no idea.

question 3,4,5 No idea.

question 8 The point of intersection with the y axis is (0, -3/7) can you finish now?

question 10 Check the dot product of those two vectors.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

(x^2)-(9)/(x-3) diya question 1 is this

---

Malik

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: mcq help for final exams

Do you mean

?

Last edited by iamaditya (2017-03-31 01:44:07)

---

Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

How
Question 7: It depends on the function of x.

---

Malik

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: mcq help for final exams

Yes, the slope of a line depends on the function of x.

---

Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

No formula used there ??
How can you prove your line A line is parallel to an axis if the other axis=a constant. For e.g. y=5 will have a line parallel to the x axis.
A line is parallel if m1=m2???

---

Malik

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

Yes (x^2)-(9)/(x-3)

---

Malik

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

Commutative law hold In???
Inner product
Sclar product
Vector product
Cross product???????
????

---

Malik

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: mcq help for final exams

Yeah ,see the denominator part carefully when x=3.

---

Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

There is no denominator in question 1 there is x+3 remainder???

---

Malik

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: mcq help for final exams

Commutative law hold In???

Commutative law holds in multiplication and addition, but not in subtraction and division since

Last edited by iamaditya (2017-03-31 01:53:31)

---

Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: mcq help for final exams

Hi;

question:9   ax+by+c will represent eq of straight line parallel to y axis if??

I think that first you should have an equation. ax+by+c is not an equation. ax+by+c = 0 is an equation. Equations have equal signs in them.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Zeeshan 01

Member

Registered: 2016-07-22

Posts: 746

Re: mcq help for final exams

I think that first you should have an equation. ax+by+c is not an equation. ax+by+c = 0 is an equation. Equations have equal signs in them.

Ok it equal to zero so what we do

---

Malik

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

Re: mcq help for final exams

See my solution here

---

Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: mcq help for final exams

I would solve for y and make use of the standard slope equation y = mx + b

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.