ISI maths.. 04,05,06 doubts.. (reply soon plss)

[AJ]

I know a lot of questions.. these are.. but really need help....

[ritu]

for 7th question u can randomly check for easy log values>3    like for (3,4)  we have log 4 /log3=.6020/.4771<1.333....so option a....i know its crude but couldnt think of anythng else....



for 7 just calculate integral for n=1,2 and 3 and u will see the pattern.....which will be option c...:)

[AJ]

But how to calculate log with a table or calculator...??

We are not allowed calculators, right?

[AJ]

ooohhhhh... I got it...

Its simpler if we check for like...
e^2 and 2^3 ..

Thanks..

Do u know any other among these..???

[AJ]

Can anyone plss reply to 3rd and 4th.... rest done!!!!

[seema]

can u pls tell hw did u do ques 8

[AJ]

I dint solved it completely... Because, I don't know how to....

What I did was.. multiplies the terms in bracket with 1st column
 after multiplication and matrix operations...

we need this column to be a,b,c

so.. only in (d) option, that looks feasible...

cuz we vl have an a, b and c right away.. with some other terms in first column...

In rest of the options, we are not getting any such situation...

I know, Awful method it is, but .......