A= 3 d= 5 then find tn and sn
Answers
Answered by
8
Answer:
number of terms ya last term to de bhai
aur vaise tn = sn same hota
Answered by
0
Answer:
given below
Step-by-step explanation:
Given :
a = 3 and d = 5
To find : tn
therefore, by using formula
tn = a+(n-1) d
tn = 3+(n-1) 5
tn = 3+n-1 x 5
tn = 3+n-5
tn = n-5-3
tn = n-8
tn = n-8
Sn = n/2[2a+(n-1)d ]
Sn = n/2[2x3+(n-1)5]
Sn = n/2[6+(n-1)5]
Sn = n/2[6+n-1 x5]
Sn = n/2(6+n-5)
Sn = n/2(n-5-6)
Sn= n/2xn-11
Sn = 2n/2-11
Sn = n-11
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