Asked by LERATO
THE FIFTH TERM OF AN ARITHMETIC SEQUENCE IS 23 AND THE 12TH TERM IS 72.AND THEY SAY DETERMINE THE FIRST THREE TERMS OF THE SEQUENCE AND NTH TERM
Answers
Answered by
Reiny
you have to know the formula for the general term of an AS.
term(n) = a + (n-1)d
term5 = a+ 4d = 23
term12 = a + 11d = 72
subtract them
7d = 49
d = 7
sub into a+4d = 23
a + 28 = 23
a = -5
first three terms are -5 , 2, and 9
term(n) = a + (n-1)d
term5 = a+ 4d = 23
term12 = a + 11d = 72
subtract them
7d = 49
d = 7
sub into a+4d = 23
a + 28 = 23
a = -5
first three terms are -5 , 2, and 9
Answered by
michelle
How do i get to the answers as shown above
Answered by
Mpho
Thanks for helping me I wish we can work together