igweka Emmanuel

This page lists questions and answers that were posted by visitors named igweka Emmanuel.

Questions

The following questions were asked by visitors named igweka Emmanuel.

Answers

The following answers were posted by visitors named igweka Emmanuel.

Sn = n/2(2a+ (n-1)d )=168 S12 = 12/2( 2a + (12-1)d )=168 => 6(2+11d)=168 => 12a+ 66d = 168 ...................equ (1) Tn =a + (n-1)d T3= a + (3-1)d ..............equ(2) Then Work equ(1) and 2 12a +66d=168 a + 2d = 7 a = 7-2d Substitute "a" 12(7-2d) + 66d...