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find 38th term 1,7,8,49,50,56,343,344,350,351,392 ,393,399,400,………

Read Solution (Total 5)

406
1,1*7,7+1,7*7,7*8,7*49,7*50,.....
9 years agoHelpfull: Yes(4) No(12)

1: initially take 1
2: multiply 1 with 7 ie:1*7=7
3:then add 1 to the previous number obtained by multiplying with 7 ie:7+1=8
4:take 2nd no. ie.7 then multiply by 7 ie.:7*7=49
5:again follow the same procedure..ie:add 1 to the 49 ie:49+1=50
this continues ....
To get any specific no. ie at index N. compute N/2. If N is even then the no. at index N will be:
{N/2(should be integer)*7}.
otherwise(if N is odd): N/2*7 + 1.
9 years agoHelpfull: Yes(3) No(1)
38 th term is (344*7+1)*7=2409
9 years agoHelpfull: Yes(1) No(0)
2401...they are in the powers of 7
9 years agoHelpfull: Yes(0) No(1)
2401,2402,2408,2409
9 years agoHelpfull: Yes(0) No(0)

TCS Other Question

if f(X)=1+x+x^2+...........x^6 the remainder when f(x^7) is divided by f(x) is an urn contains m white balls ad n black balls,a ball is drawn at random and is put back into the urn along with k additional balls of the same colour as that of the ball drawn.a ball is again drawn at random,the probability of drawing a white ball is?
a)increases with k
b)does not depend on k
c)decreases with k
d)cannot be determined without additional information