Find the sixth term s_6 of the series which corresponds to the arithmetic sesquence with a=5 and d=3.?

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Find the sixth term s_6 of the series which corresponds to the arithmetic sesquence with a=5 and d=3.?

2007-01-04 01:18:59 · 3 answers · asked by pkbrauer 1 in Science & Mathematics ➔ Mathematics

3 answers

the sixth term = a + 5 *d = 20

2007-01-04 01:21:11 · answer #1 · answered by James Chan 4 · 0⤊ 0⤋

sixth term =a+d(6-1)
=5+3(5)
=4(5)
=20

2007-01-05 22:43:50 · answer #2 · answered by doctor 5 · 0⤊ 0⤋

now a it somewhat is the 1st time era is 28 d it somewhat is the common distinction is 28 so, Sn = n / 2 ( 2a + (n – a million) d ) S20 = 20 / 2( fifty six + 19 × 28 ) =10 ( fifty six + 19 × 28) = 5880 so the main fabulous selection is D

2016-12-12 03:29:37 · answer #3 · answered by ? 4 · 0⤊ 0⤋