Question

A1 is equals to minus 4 AC is equal to minus 6 find A2 A3 A4 A5​

Answer 1

Step-by-step explanation:

an= a+(n-1).d

a1+a3+a5 = -12 or a+a+2d+a+4d= -12

3a+6d =-12 or a+2d = -4…………….(1)

a1.a2.a3. = 8 or a.(a+d).(a+2d)= 8

On putting d = -(a+4)/2 from eq. (1)

a.(2a-a-4)/2.(a-a-4) =8

a.(a-4).(-2) =8

a^2–4a+4 =0 or (a-2)^2 =0 => a = 2

But d=-(2+4)/2 = -3

Now a2+a4+a6 = ?

=a+d+a+3d+a+5d

=3a + 9d

=3×2 +9×(-3)

=6 -27

=-21 , Answer.

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