Answers

2015-11-29T17:03:15+05:30
Given digits=10,7,4......
a1=10,a2=7
difference(d)=a2-a1
=7-10=-3
d=-3
then 30th term=a+29d
=10+29(-3)=10-87=-77


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2015-11-29T17:13:08+05:30
Given AP = 10,7,4     find 30th term ??

a = 10   n = 30      d = T2-T1 = 7-10 = -3

Tn = a+(n-1)d

⇒    10+(30-1)-3

⇒    10+ 29 × (-3)

⇒    10 - 87  = -77

T30 = -77..

hope it's help u
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