Question

the 19th term of series -4,2,8.....​

Answer 1

The 19th term of series is 104

Step-by-step explanation:

GIVEN

a = t1 = -4 , t2 = 2 , t3 = 8

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To Find

19th term of a series

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We need to find the common difference first

We know that,

Common Difference (D) = t2 - t1

Common Difference (D) = 2 - (-4)

Common Difference (D) = 6

Common Difference (D) = 6

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We know that,

an = a + ( n - 1 ) × d

a19 = -4 + ( 19 - 1 ) × 6

a19 = -4 + 18 × 6

a19 = -4 + 108

a19 = 104

a19 = 104

The 19th term of series is 104