Find the sum of the 51 1st terms of the arithmetic sequence 3,5,7,9,11,...

2
5???
itong yung na copy ko sa classrom na example ito ang diko ma gets d=a2-a1 saan yan nkuha?
d2=a2-a1, formula yan, yan ang tina tawag n common difference
Yes ganyan nga nakuha yung common diff
So a2 which is equal to 5 and a1 is equal to 3

Answers

2016-07-08T21:16:17+08:00
The 51st term is 103
1 4 1
please show the solution all solution please please :( :(
a1 + (n - 1)d
3 + (51-1)2
3+(50)2
3+100
=103
2016-07-09T08:26:19+08:00
Sum all of terms
S= (n/2)(a1+an)
Last Term
an = a1+(n-1)(d)
where:
n=51
a1=3
a2=5
common difference, d=(a2-a1)=(5-3)=2
an=5+(51-1)(2)
an=105
S= (51/2)(5+105)
Sum all of terms = 2805,, Ito answer ko dahil sinabi nya find the sum of 51st term, hindi po kasi na state na term ang hinahanap

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