Qualification > Math
MAth4 help
madikay:
tanks man are you a genius or what ?
hey but i didnt understand questions 9 vi, v and iv.
what did u use? can anyone help
Ghost Of Highbury:
hey zara did u understand???
i guess not
check my recent posts..
i have explained it
zara:
yea i got it adi....or i must say the genius guy<mashallah>keep it up :)
Ghost Of Highbury:
hey madikay.
ok lemme explain to u how i got (iv), (v) and (vi)
as itold u before use the formula
a+(n-1)d + 1/2(n-1)(n-2)c
a- 1st term
d - difference between 1st and 2nd term
c final difference(find the difference of the difference until u get a constant value)
the sequence
4 9 16 25
+5 +7 +9
+2 +2
you get 2 as the final difference
now substitute
4 + 5n -5 + ((n-1)(n-2) * 2)/2
= 4 + 5n -5 +n^2 -3n +2
= n^2 + 2n + 1
= (n+1)^2
use the same method for (v)
or if not possible try and observing the sequence very carefully and get the rule
the answer for (vi) is sequence for (iv) - sequence for (v)
madikay:
thanks man your are the best.
i understand now. increased your rep
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