5, 35, 76, 253, 488, 911, ?
Answers
Answered by
11
1460 is the answer
reason:
(5*22)+15=35
(10*32)-14=76
(15*42)+13=253
(20*52)-12=488
(25*62)+11=911
(30*72)-10=1460
reason:
(5*22)+15=35
(10*32)-14=76
(15*42)+13=253
(20*52)-12=488
(25*62)+11=911
(30*72)-10=1460
rdahin:
what aabout first number of series 5? it must follow the rule of series too
According to this rule first number of series to be 0*12-16=-16
(5*22)+15 =125 not 35 and so for other entries too
Answered by
13
5 is not the correct number to the sequence, for rest of member ,formula for the nth term tn is given by
tn=5n(n+1)^2-(16-n) (-1)^n
6 th term (ignoring zeroth term5) is
5*6(6+1)^2-(16-6)(-1)^6
=30*49-10=1470-10=1460
tn=5n(n+1)^2-(16-n) (-1)^n
6 th term (ignoring zeroth term5) is
5*6(6+1)^2-(16-6)(-1)^6
=30*49-10=1470-10=1460
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