-or-lehimath.weebly.com/uploads/5/0/2/5/5025433/s3h_7.2_&_7.4_lesso… · now. you plan to...
Post on 06-Aug-2020
2 Views
Preview:
TRANSCRIPT
-OR-
an=dn+c
similar to
y=mx+b
Using an= dn+c :
an= 5n+c
6 = 5(1)+c
c = 1
so an= 5n+1
and a100= 5(100)+1
= 501
Using an= dn+c :
an= 2n+c
14 = 2(1)+c
c = 12
so an= 2n+12
and a100= 2(13)+12
= 38
Using an= dn+c :
an= 2n+c
10 = 2(1)+c
c = 8
so an= 2n+8
a50= 2(50)+8 = 108
What are the first & last terms of this series?
How many terms are there in this series?
So our formula for the sum is:
Assignment: Section 7.2: problems 8-12, 14-16, 20-23, 29-37, 51-6
Section 7.4: problems 10-15, 17-26, 30-33, 36-38
(On all problems asking for recursive & explicit formulas, only give explicit
formula.)
top related