2. If (5X-3), (X+2) and (3X-11) form an arithmetic
progression, find the fifteenth term.
A. -86
B. -79
C. -81
D. -84
Solution:
The formula to find the nth term of an arithmetic
progression is:
Where:
an = nth term
a1 = 1st term
n = number of terms
d = difference
In an arithmetic progression, the
difference between any two consecutive terms is always the same. Therefore:
Solving for d gives:
pre bkit x+2 un andun e x-2 un nasa question slmat ^^
ReplyDeletesir!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ReplyDeleteProbably a typo in the question. I corrected it. Thanks for pointing it out.
ReplyDeletehello, bakit po -4x+5 yung ginamit sa paghanap ng d? salamat
ReplyDelete