Asked by Nduolugburu
find:
a)the tenth term
b)the sum of the 21st terms of the progression:-10,-8,-6
a)the tenth term
b)the sum of the 21st terms of the progression:-10,-8,-6
Answers
Answered by
oobleck
a = -10
d = 2
(a) a10 = a+9d
(b) S21 = 21/2 (2a+20d)
d = 2
(a) a10 = a+9d
(b) S21 = 21/2 (2a+20d)
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