Numbers which are multiple of 2 = 600
Numbers which are multiple of 3 = 400
Numbers which are multiple of 5 = 240
Total = 1240
Numbers which are multiple of 6 = 200
Numbers which are multiple of 15 = 80
Numbers which are multiple of 10 = 120
Total = 400
Numbers co-prime to 6 or 15 = 1200 - (1240-400) =360
Since either is asked: Add the multiples of 30 = 40
Numbers co-prime to either 6 or 15 = 360+40 = 400
@Puys: Bhai log man ni lag raha tha aapke bina..Isliye aa gaya...Ab pakka bye bye
For 6, we've to remove every multiple of 2,3dude can u tell me y we have to remove every multiple of 3,5 for 8
For 8, we've to remove every multiple of 3,5
Coprime to both 6 and 15:
general form is taken when the difference of the nos in the given sequence are in a.p...it suits perfectly for tat particular type of questionh T c Sayshey, what is meant by general term of an AP or GP or HP ?
can anyone explain clearly how the general term isforget tat.. jus take the simple general formula as an^2+bn+c
(n^2 - n + 2)/2....just coping it from fb...
product of first 50 odd nos...?
wat is the simple way to find the product of first 50 odd nos..?
whenever the common difference is an AP, try to fit in a square.dude.. an^2+bn+c is a general formula right... can the same be used for any sequence of this form..?
Let the nth term be an^2+bn+c
extrapolate to find the 0th term of the series. It would be 3.
The nth term is n^2-n+3
wat if the sequence is like this, 3,5,9,15,23.... upto 2000 nos...
the formula will change uh
@bbwi: excellent dude.. but of these two formulae which is the one tat is appropriate..and can u explain more..i cudn understand fully...
guys can u pls tel me how to proceed with these sort of probs in which the intervals of the sequences are in a.p
find the sum of the series.. 1,2,4,7,11,16 ...... for 2000 terms