options : 0 , 1 , 2 , not
Find the number of solutions of sinx = x^2 + x + 1
@rkshtsurana
@rkshtsurana said:1/2( 1/2 - 1/n(n+1) ] n tends to infinityroughly 1/4 = 0.25optionsa) 6.xxb and c are -ve so d) none of these ?@techsurge@techsurge said:The sum of series below is1/1.2.3 + 1/3.4.5 +1/5.6.7......a) e^2-1b) 2log2 -1 [base 10]c) log2 -1d) None of these
answer is none
the asnwer would be log2 -1/2 [base e]
Solve as Tn = 1/(2n-1)(2n)(2n+1)
=1/2[1/2n-1 + 1/2n + 1/2n+1 ]
but one should know the expansion of log for this :banghead:
an iift question
@rkshtsurana bhai 0 hai kya kyunki sin0 pe 0 ho jayega left wala hissa and agar 0 se age badayenge toh rhs greater than 1 ho jayega and sin never greater than 1?
@rkshtsurana said:If sin x, cos x and tan x are in G.P., then cot^6 x €“cot^2 x =(a) 0 (b) €“1(c) 1 (d) Depends on x no OA
its a cat 12' type question..right?
the answer is 1.. simple substitution of the given condition..
How many 8 digit numbers are there the sum of whose digits is even?
plz help me guyz...plz..plz plz...... :)
plz help me guyz...plz..plz plz...... :)
@Anivesh90 said:is it a cat 12' type question..right?the answer is 1.. simple substitution of the give condition..
cat 12 ka pata nhi.. but em fond of geo n trigo 
@kinkong said:How many 8 digit numbers are there the sum of whose digits is even? plz help me guyz...plz..plz plz......
is the ans 9* 10^7 / 2 = 45000000
total 8 digit no..half even half odd
@rkshtsurana said:cat 12 ka pata nhi.. but em fond of geo n trigo
my friend had a similar question..on 28 or 29..
@kinkong bhai dekh even kab ho skat ahi jab saare odd ho ya saare even ho ya phir 2 odd ho... ya 4 odd ho ya 6 odd ho .
toh dekh pahle do condition hue 5^8 or baki keliye
yhai honi chahiye mere hisabs se toh 5^9 aya kya answere ?
@rkshtsurana said:Find the number of solutions of sinx = x^2 + x + 1 options : 0 , 1 , 2 , not
No(real) solution.
for (real)@rkshtsurana said:Find the number of solutions of sinx = x^2 + x + 1 options : 0 , 1 , 2 , not
0?
sinx-x2-x-1 wont result to 0 in any case..
@sauravd2001 said:@rkshtsurana bhai mere wala answere sahi tha kya question ka ?
conditions sari sahi he wese toh..but calc kese ki pata nhi tumne..0 ke case alag lene padenge...go simpple..ya toh odd ya even..barabr hnge ..so half
@kinkong said:How many 8 digit numbers are there the sum of whose digits is even? plz help me guyz...plz..plz plz......
9*10^6 *5
5 because last digit can be even or odd depending on previous terms, if the sum of digits is odd before last place use 1,3,5,7,9 else 2,4,6,8,0
@rkshtsurana said:Find the number of solutions of sinx = x^2 + x + 1 options : 0 , 1 , 2 , not
is it 0??
@Anivesh90 @vikky312 @sauravd2001
sab sahi.....my approach..seedha graph bana lo ..sin x and x^2 + x+ 1..no intersection
@rkshtsurana said:@Anivesh90@vikky312@sauravd2001sab sahi.....my approach..seedha graph bana lo ..sin x and x^2 + x+ 1..no intersection
same thing! easy functions to draw! 