Could someone plz check If I am correct?

Question

0

634

2

+116

Find a₁₀ of the arithmetic sequence: -4,2,8,14,20

the formula is : a_n=a₁+(n-1)d

so is this correct: a₁₀=-4+(10-1)+6=11?

BlueFire28 May 4, 2016

Guest · Answer 1 · 2016-05-04T09:27:16

Find a10 of the arithmetic sequence: -4,2,8,14,20

the formula is : an=a1+(n-1)d

so is this correct: a10=-4+(10-1)+6=11?

You have your formula of:an=a1+(n-1)d

a10=-4 + (10 -1) x 6=50. Why did you change d to + instead of X??.

BlueFire28 · Answer 2 · 2016-05-04T09:29:34

Oh right I guess because the sequence was adding 6 I put a + sign. thank you for ur help!