CAT Question of the Day Consider a series whose nth term is given by tn = (n2 + n + 1)n!
Find t1 + t2 + t3 + … + t9
| OPTIONS | | |  | 1) | 11! – 10! – 1 | | | 2) | 11! – 9! – 3 | | | 3) | 10! – 9! – 1 | | | 4) | 12! – 11! – 2 |
Tip of the Day Habits maketh a man (and woman). This applies to your CAT preparation as well. Rather than slogging it out on a few days when you are in high spirits, and taking some days off when you don't feel upto the mark, make it a habit to study for a few hours everyday, no matter what. Your study regimen will help you perform on the day of CAT too - the discipline will ensure that you perform not necessarily or whether you feel good, but irespective of the pressure. Last year's Question of the day (05-Jun-11) At a strange party, there are n guests G = {g1, g2, g3,….,gn} and m hosts H = {h1, h2, h3,….,hm}. Gi is the set of guests the host hi shakes his hand with. Similarly, Hi is the set of hosts the guest gi shakes his hand with. Which of the following holds if we know that all guests handshake atleast one host and no host handshakes all guests?
| OPTIONS | | | | | 1) | union(G1, G2, G3,….., Gm) = G AND intersection(H1, H2, H3,….., Hn) = {ϕ} | | | 2) | union(G1, G2, G3,….., Gm) = G OR intersection(H1, H2, H3,….., Hn) = {ϕ} | | | 3) | union(G1, G2, G3,….., Gm) = {ϕ} OR union(H1, H2, H3,….., Hn) = H | | | 4) | intersection(G1, G2, G3,….., Gm) = {ϕ} AND intersection(H1, H2, H3,….., Hn) = H
| | | 5) | intersection(G1, G2, G3,….., Gm) = G AND union(H1, H2, H3,….., Hn) = H
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