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Ask KERALA Class 11 Science Mathematics question free ×

Queries asked on Sunday and after 7 pm from Monday to Saturday will be answered after 12 pm the next working day.

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# KERALA Class 11 Science Mathematics Free Doubts and Solutions

## Find 3nP4=5(n-1)P4 , for n>4 ?   (From 7th chapter permutations and combinations.)

Asked by antonyjojy999 15th January 2016, 7:11 PM

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## If the sum of a certain no. of terms of the A.P. 25,22,19,...is 116.Find the last term.

Asked by mythili Suresh 2nd September 2015, 8:14 PM

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## P(n): 1+3+3^2+.....+3^n-1=(3^n-1)/2. If P(k) is true prove P(k+1) is true.

Asked by Deebu 1st February 2015, 4:08 PM

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## Draw the graph of the function f(x)=x+1,where x is an element of R.   [please explain why the graph is a V shape and not a slanding line. Isn't V shape the graph for modulus function?]

Asked by Deebu 1st February 2015, 1:19 PM

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## Find the derivative of f(x)=Sin x using the first priciple. [I got everything till the last step. How can cos(x+(h/2)).(sin h/2)/(h/2)=cosx.1?]   [also in short what exatly is the first principle?]

Asked by Deebu 1st February 2015, 1:31 AM

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## What is the mnimum number of ways of choosing 4 cards from a pack of 52 playing cards? in how many of these: 1) are 4 card of the same suit? 2)do 4 cards belong to 4 different suits?   [I found the answer to 1) as 13C4+13C4+ 13C4+ 13C4. but when I don't understand how to solve question number 2. According to solutions it is given as 13C1 x 13C1 x 13C1 x 13C1= 13^4.   I understand how we got 13C1 but I don't understand why multiplication was used and not division]

Asked by Deebu 31st January 2015, 6:55 PM

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## Find the distence between 4x-3y-9=0 and 8x-6y-21=0

Asked by Deebu 28th December 2014, 12:29 AM

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## Find the term indipendent of x in (((3/2)x^2) - (1/3x))^6

Asked by Deebu 28th December 2014, 12:27 AM

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## Find the locus of the set of points P such that distence from A(2,3,4) is equal to twice the distence from B(-2,1,2).   [ I took P as (x,y,z) and found distence from A and distence from B. Now what?]

Asked by Deebu 28th December 2014, 12:23 AM

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## Find the point which trisect (4,0,1),(2,4,0).

Asked by Deebu 28th December 2014, 12:20 AM