Question
The 3rd and 12th terms of an arithmetic progression are 12 and -24 respectively. What is the 50th term?
Answers
Reiny
a+2d=12
a+11d=-24
subtract them
9d = -36
d = -4
then a-8=12
a=20
term(50) = a+49d
= ...
a+11d=-24
subtract them
9d = -36
d = -4
then a-8=12
a=20
term(50) = a+49d
= ...
gwinnett
what is the product of 23 and 45.