Question

Find the middle term of AP : - -11, -7,-3........45​

Answer 1

Answer:

a=-11. d= -7-(-11)=4

Step-by-step explanation:

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Answer 2

Answer:

Here, A.P.: -4,-2,.................,88

So, First term (a) = -4

Common difference (d) = -2-(-4)

                                       = 2

We know that

an = a+(n-1)d

So, 88 = (-4)+(n-1)(2)

=> 92 = 2n - 2

=> 94 = 2n

∴ n = 47

There are 47 terms so middle term would be (47+1)/2

 = 48/2 = 24

So, a₂₄ = a+(24-1)d

           = -4 + 23(2)

           = -4 + 46

           = 42

So, the middle term is 42.

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