1.) Find the sum of the first 16 terms of the arithmetic sequence 4, 7, 10, 13
2.) Find the sum of the first 21 terms of the sequence 3,9,15,21
3.) find the sum of the first 18 terms of 7,14,21,28
4.) Find the 25th term of the sequence 6,10,14,18
2.) Find the sum of the first 21 terms of the sequence 3,9,15,21
3.) find the sum of the first 18 terms of 7,14,21,28
4.) Find the 25th term of the sequence 6,10,14,18
Add an Answer
More Questions From This User See All
Answers & Comments
Answer:
1. an=a1+d(n-1)
an=a1+d(n-1) a16=4+3(16-1)
an=a1+d(n-1) a16=4+3(16-1) a16=4+3(15)
an=a1+d(n-1) a16=4+3(16-1) a16=4+3(15) a16=4+45
an=a1+d(n-1) a16=4+3(16-1) a16=4+3(15) a16=4+45 a16=50
2.an=a1+d(n-1)
a21=3+6(21-1)
a21=3+6(20)
a21=3+120
a21=123
3.an=a1+d(n-1)
a18=7+7(18-1)
a18=7+7(17)
a18=7+119
a18=126
4.an=a1+d(n-1)
a25=6+4(25-1)
a25=6+4(24)
a25=6+96
a25=102
Step-by-step explanation:
The nth term of an arithmetic sequence with first term a1 and common difference d is given by :
an=a1+d(n-1)