Find the sum of first 19 term of an ap whose nth term us given by tn=7-4n
Answers
Answered by
1
plz Mark it as a brainliast
A=3
a2=-1
so D=-4
s19=19/2(6+18×-4)
19/2×-66
19×-33
-627
A=3
a2=-1
so D=-4
s19=19/2(6+18×-4)
19/2×-66
19×-33
-627
Answered by
0
a19 =-33. is it right....
sum is -285.
sum is -285.
Similar questions