Find the 7\(^{th}\) term of the sequence -10, 50, -250 ...........
A
165250
B
156250
C
-156250
D
-165,250
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
T\(_7\) = ar\(^{n-1}\) = ar\(^{6}\)
a = - 10, r = - 5
T\(_7\) = -10(-5)\(^{6}\)
T\(_7\) = - 10 x 15625 = - 156250
Source: WAEC / JAMB / NECO Classroom Archive (Record #70254)