Question

calcular la suma de los elementos del conjunto

A={x/ x e N; 7< 2x+1< 15}

Answer 1

Here in, we have two equations:

7 < 2x + 1 and 2x + 1 < 15

And we will solve both the equations simultaneously.

=> 7 < 2x + 1 < 15

Subtract 1:

=> 7 - 1 < 2x + 1 - 1 < 15 - 1

=> 6 < 2x < 14

Divide by 2:

=> 6/2 < 2x/2 < 14/2

=> 3 < x < 7

Thus, A = { 4, 5, 6 }

Answer 2

Resulves por parted

A={x/ x e N; 7< 2x+1< 15}

answer=A=4,5,6

te piden la sumas de los elementos de

A=9+5+6=15

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