need this urgently Pls solve this
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ans. 60 by formula of An = a +( n-1) × d
HARSHPESHNE:
an kya lya
21
Answered by
1
the ap is 20,22,24......
a=20,d=22-20=2
a21=a+20d
a21=20+20(2)
a21=20+40
a21=60
a=20,d=22-20=2
a21=a+20d
a21=20+20(2)
a21=20+40
a21=60
yes u r right
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