Answers

2016-03-18T17:53:25+05:30
A6 = a3+21 a = 12 a +5d = a +2d +21 3d = 21 d = 7 a 20 = a+19d = 12+19*7 = 12+133 =145 Therefore a20 = 145 Plz mark as brainliest ----- Jahnaviā™„
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2016-03-18T20:38:05+05:30
A+5d=a+2d+21
3d=21
d=7
a=12
20 th term=12+19(7)
12+153
176
hope it is right


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