Math, asked by aiyyogorja, 10 months ago

the sum of all of ap : -4 , -1 , 2 , 5 , ........ , x is 437 . find x

Answers

Answered by venkatavineela3

1

Answer:

Step-by-step explanation:

sum of n terms in AP=(n/2)*(2a+(n-1)*d)

(x/2)((2*-4)+(x-1)*3)=437

x(-8+3x-3)=437*2

x(3x-11)=437*2

3x^2-11x-874=0

2622=3*874=3*2*437=3*2*19*23

3x^2+57x-46x-874=0

3x(x+19)-46(x+19)=0

x=-19,46/3

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