If the nth term of arithmetic progression 23, 25, 27, 29, .... are equal then the value of n
Answers
Answered by
1
the value of k n will equal
Answered by
5
Step-by-step explanation:
23,25,27,29
a=23. d=a2-a1
d=25-23
d=2
an=a+(n-1)d
23+(n+1)2
23+2n-2
an=21+2n----------(1)
-17,-10,3,4
a=-17. d=a2-a1
d=-17-10
d=-7
an=a-(n+1)d
-17-(n+1)7
-17-2n+7
an= -24-7n------------(2)
21+2n=-24-7n
21+24=7n-2n
45=5n
n=45/5
n=9
(proved)
Similar questions