Asked by Tyoawase
the 3rd and 7th terms of an arithmetic progression are 6 and 30 respectively. determine the
(I) common difference
(ii) first term
(iii) 10th term
(I) common difference
(ii) first term
(iii) 10th term
Answers
Answered by
mathhelper
just use your basic formulas....
a+2d=6, a+6d=30
subtract them:
4d=24
d = 6, then mentally ... a = -6
10th term = a+9d
= -6+54
= 48
a+2d=6, a+6d=30
subtract them:
4d=24
d = 6, then mentally ... a = -6
10th term = a+9d
= -6+54
= 48
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