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JAMB Mathematics 2024 Paper

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Question : 22

Total: 50

Find the 7

^{th}

term of the sequence -10, 50, -250 ...........

165250
156250
-156250
-165,250

Solution:

T $_7$ = ar $^{n-1}$ = ar $^{6}$

a = - 10, r = - 5

T $_7$ = -10(-5) $^{6}$

T $_7$ = - 10 x 15625 = - 156250

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