Question

2nd term of Ap is 7 more than 6th term & 8th term of Ap is 70.Find Ap and 100th term of Ap​

Answer 1

Answer can be verified by substituting the value of a and d in 8th term of Ap which will give to answer 70.

Answer 2

Answer:

a₂ = a₆ + 7

a + d = a + 5d + 7

4d = -7

$d = \frac{-7}{4}$

a₈ = a+7d = 70

a = 70 - 7(-7/4)

a = 70 + (49/4) = 329/4

a₁₀₀

= a + 99d

= (329/4) + 99(-7/4)

= (329/4)+(-693/4)

= -364/4

= - 91

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