Question

if 7 times the 7th term of ap is equal to 11 times the 11th term show that 18th term is 0. Can you find first term and common difference .justify

Answer 1

Answer:

yes we can find

Step-by-step explanation:

given

7(a7) = 11(a11)

to show a18 = 0

7(a + 6d) = 11(a +10 d)

7a + 42 d = 11 a +110 d

7a - 11 a = 110 d - 42 d

-4a = 68 d

a/d = 68 / -4 = 17/-1

therefore a = 17 , d = -1

a18 = 0

a + 17 d = 0

17 + 17 ( - 1) = 0

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Answer 2

Hope this will be helpful for you!!!!!