ECAT and MCAT Preparation: Post your doubts here!

[smzimran]

Q. A function is said to be even if f(x) = f ( -x ) . Which of the following is not an even function?
A: y = |x|
B: y = sec x
C: y = log (x^2)
D: y = x^2 + sin x
E: y = 3x^4 - 2x^2 +17

I marked B but the correct answer is D

 

[XPFMember]

aoa wr wb
how do i prepare for english? looks difficult......m giving mcat btw

 

[Goodfella]

Q. A function is said to be even if f(x) = f ( -x ) . Which of the following is not an even function?
A: y = |x|
B: y = sec x
C: y = log (x^2)
D: y = x^2 + sin x
E: y = 3x^4 - 2x^2 +17

I marked B but the correct answer is D

I guess the book's probably wrong here, as secx = 1/cosx and the value for cos(x) and cos(-x) is the same, your answer looks right as the value of sin(x) and sin(-x) is not the same!

 

[smzimran]

I guess the book's probably wrong here, as secx = 1/cosx and the value for cos(x) and cos(-x) is the same, your answer looks right as the value of sin(x) and sin(-x) is not the same!

SAT book (Barron's) !!!!!

 

[leadingguy]

if U , A and B are three sets then A is an equal subset ----------------- where u is a universal set.

a)A'
b)B'
c)AU B
d)A intersection B

what is the ans.???''


in the frst line equal sub set means U rotated at 90 degrees, clockwise with a dash beneath..

 

[Zaryab]

The question is demanding about the function which is not even.
"D" here is the right option. Sec(x) = Sec(-x) is an even function because by replacing the value of x, the function remains the same.
In D option, the function is changed so it is not an even function.

 

[smzimran]

if U , A and B are three sets then A is an equal subset ----------------- where u is a universal set.

a)A'
b)B'
c)AU B
d)A intersection B

what is the ans.???''


in the frst line equal sub set means U rotated at 90 degrees, clockwise with a dash beneath..

C

 

[leadingguy]

C

a healthy explanation can do more good. so plz

 

[leadingguy]

aoa wr wb
how do i prepare for english? looks difficult......m giving mcat btw

wel for english just take a sat ielts or toefl book...
there are topics given for practice namely,
1. sentence correction
2. grammer
3.direct, past particple
4. etc
5. at the end of these books is a list of vocabulary: learn 2 to 3 pages every day..
learn carefully the use of colon, semi colon, exclamination mark, and etc.
english is what we all are used too; but it requires serious practice.


I am not sure but if MCAT has critical writing and composition writing then some exercises of it is present there too

 

[smzimran]

a healthy explanation can do more good. so plz

Lol, i was asking u to confirm frm the book whether it was the correct answer or not!

Anyways, first there is a mistake by you in writing the question the

sign means proper subset (i.e the whole thing is inside the circle)

and the

means improper subset (i.e the whole set will not be inside the circle, there will be some part which is outside)
example:


Use this information to solve the question, remember in your question, A is an improper subset of __________

 

[Goodfella]

I guess the book's probably wrong here, as secx = 1/cosx and the value for cos(x) and cos(-x) is the same, your answer looks right as the value of sin(x) and sin(-x) is not the same!

SAT book (Barron's) !!!!!

lol yes it's D, the explanation i gave u was correct though just got confused

 

[Slash]

MCQS TIPS...

** Read the multiple choice question carefully and think of an answer before you see your choices. Read the choices to see if your answer is there. If so, it is probably right. Read the other answers quickly to be certain.

** If your answer is not one of the choices, then read all the choices carefully and start to eliminate choices.

** Cross out any answers that are obviously wrong.

** When you narrow your choices to two, try each answer with the question to see if they both make sense. Sometimes you'll find a hidden clue, like a subject/verb agreement that gives it away.

** If you are confused by "all of the above" and "none of the above" questions and they tend to take up too much time, leave all of those blank and go back to them. These questions have an element of logic to them, and some people take longer than others to work out logic problems. If you find that they require a little extra concentration, you may need to treat them as a separate section.

** If you are stumped about a word, dissect it for clues. Think about the meanings of the prefix or suffix. Compare it to other words that start with the same letters. For example, the prefix "epi" is found in the word epidermis, which refers to the top layer of the skin. What can you discern, then, about a plant called an "epiphyte?" Would it have roots that stretch deep into the dirt or would it grow on the surface of something?

** Don’t second-guess yourself. If you make an educated guess the first time around, don’t go back and start changing your answers around.

** Keep an eye on the clock to give yourself time to re-visit the questions you left blank.

** If all else fails, choose B or C! A few studies show that those answers are correct at a slightly higher rate than A or D.

 

[HIMYM forever!!]

Q. A function is said to be even if f(x) = f ( -x ) . Which of the following is not an even function?
A: y = |x|
B: y = sec x
C: y = log (x^2)
D: y = x^2 + sin x
E: y = 3x^4 - 2x^2 +17

I marked B but the correct answer is D

Well duh the book is right. They asked which one is NOT an even function.

 

[smzimran]

Well duh the book is right. They asked which one is NOT an even function.

Hmm, got it, someone explained!

 

[smzimran]

Q. If a square prism is inscribed in a right circular cylinder of radius r and height h, the volume inside the cylinder but outside the prism is ....... ?

 

[leadingguy]

well a very bad tukka but is the ans r^2.l (pi-4)


if not then what is the ans???

 

[smzimran]

well a very bad tukka but is the ans r^2.l (pi-4)


if not then what is the ans???

wrong!

 

[leadingguy]

wrong!

what is the ans??? and yes is there any particular formula fr volume of prism ????

 

[Slash]

Q. If a square prism is inscribed in a right circular cylinder of radius r and height h, the volume inside the cylinder but outside the prism is ....... ?

(pi)(r)^2(h) - LxBxH

 

[leadingguy]

(pi)(r)^2(h) - LxBxH

yes it is rite.. i guess but are we not to put value of L,B,H by any means... as this is jxt the general assumption