Let A = {1, a1, a2...... a18, 77} be a set of integers with 1 < a1 <

1.	Let A = {1, a1, a2...... a18, 77} be a set of integers with 1 < a1 < a2 <..... < a18 < 77. Let the set A + A = {x + y : x,y ∈ A} contain elements. Then, the value of a1 + a2 + ..... + a18 is equal to _____.
Answer» Correct answer is 702 a₁ , a₂ , a₃ ,..., a₁₈, 77 are in AP i.e. 1, 5, 9, 13, ..., 77. Hence a₁ + a₂ + a₃ +...+ a₁₈ = 5 + 9 + 13 +...18 terms = 702

Let A = {1, a1, a2...... a18, 77} be a set of integers with 1 < a1 < a2 <..... < a18 < 77. Let the set A + A = {x + y : x,y ∈ A} contain elements. Then, the value of a1 + a2 + ..... + a18 is equal to _____.

Answer»

Correct answer is 702

a₁ , a₂ , a₃ ,..., a₁₈, 77

are in AP i.e. 1, 5, 9, 13, ..., 77.

Hence a₁ + a₂ + a₃ +...+ a₁₈ = 5 + 9 + 13 +...18 terms

= 702

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Let A = {1, a1, a2...... a18, 77} be a set of integers with 1 &lt; a1 &lt; a2 &lt;..... &lt; a18 &lt; 77. Let the set A + A = {x + y : x,y ∈ A} contain elements. Then, the value of a1 + a2 + ..... + a18 is equal to _____.

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Let A = {1, a1, a2...... a18, 77} be a set of integers with 1 < a1 < a2 <..... < a18 < 77. Let the set A + A = {x + y : x,y ∈ A} contain elements. Then, the value of a1 + a2 + ..... + a18 is equal to _____.