Math, asked by adityamishra62, 1 year ago

the 8TH termof Ap is zero prov that 38term is triple of 18 term ​

Answers

Answered by Anonymous
3

Given

8th term of AP = 0

To prove

a 38 = 3(a18)

Solution

a8 = a +7d

a8 = 0

Then,

a + 7d = 0

a = -7d

Now finding the value of a 38

a 38 = a +37 d

a 38 = -7d +37 d

a 38 = 30 d

Finding the value of a18

a18 = a + 17 d

a18 = -7 d + 17 d

a18 = 10d

10d × 3 = 30 d

a 18 × 3 = a38

Hence,

3 a18 = a 38

Hence proved

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