Math, asked by ishu897, 1 year ago

the 3rd term of an A.P. is 18 and 7 term is 30 . find 17th term
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Answers

Answered by anoushka99
2
 ATQ, 

a3=18
a+2d=18     ........ taking equation 1
a7=30
a+6d=30     ........... taking equation 2 
 solving 1 and 2 by elemination method  we get 
-4d= -12
d=3 ...... taking equation 3
putting 3 in 1 
a=18-6= 12 
 a17 = a+16d 

12+16(3)
12+48=60

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