History, asked by rspichawhte, 4 months ago

find the term of the airthmetric progression 9,12,15,18. .... . which is 39 more than its 36 term​

Answers

Answered by saksham9423
0

Answer:

Given: 9,12,15,18,.. are in A.P

where a=9 and d=12−9=3

t

n

=39+t

36

(given)

t

36

=a+35d=9+25×3=9+105=114

t

n

=39+t

36

=39+114=153

⇒a+(n−1)d=153

⇒9+(n−1)×3=153

⇒(n−1)×3=153−9=144

⇒(n−1)=

3

144

=48

⇒n=48+1=49

∴ the 49

th

term is 153 from above

Answered by tanya6968
1
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