in other words, what's the 2nd term?
three CD's from 65 is 80 ...CD = (80 - 65) / 3
65 is the 4th term ... the 2nd term is two CD's less
the fourth term if an A.p is 65 and its seventh term is 80 what is the sum of it's first term a and common difference b,?
2 answers
a+3b=65
a+6b=80
3b=15
b=5
what is a
get the value of a
and then say (a+b)=?
a+6b=80
3b=15
b=5
what is a
get the value of a
and then say (a+b)=?
1 answer