find tn for A.p 4,9,14,19___
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Answered by
1
for an ap its Sn
a=4,d=5
Sn=n/2(2a+(n-1)d)
=>n/2(2×4+(n-1)5)
=>n/2(8+5n-5)=>n/2(5n+3)
a=4,d=5
Sn=n/2(2a+(n-1)d)
=>n/2(2×4+(n-1)5)
=>n/2(8+5n-5)=>n/2(5n+3)
LALITNLP:
thanka
thanks
wlcm
Answered by
0
heya ,
it's Aastha....
In an AP :-
a = 4 d = 5.
Sn = n/2 { 2a + (n-1) d}
Sn = n/2 (5n +3)
I hope it help you
it's Aastha....
In an AP :-
a = 4 d = 5.
Sn = n/2 { 2a + (n-1) d}
Sn = n/2 (5n +3)
I hope it help you
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