WAEC - Mathematics (2022 - No. 8)
Find the 17term of the Arithmetic Progression (A.P):-6,-1,4
-91
-86
74
79
ব্যাখ্যা
common difference d = -1 - [-6] → -1 + 6
d = 5; a = -6
T\(_n\) = a + (n-1)d
: T\(_{17}\) = -6 + (17 - 1) 5
→ -6 + (16)5
→ -6 + 80 = 74