3 years ago

1) If a and b are positive integers such that a×a = b×b+ 15, what is the greatest possible value of a?

Mathematics

1 answer:

Dmitriy789 [7]3 years ago

3 0

Answer:

1) 8

2) 1

Step-by-step explanation:

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BigorU [14]

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Step-by-step explanation:

$a_1=4\\\\a_i=a_{i-1}+11\\\\\implies a_2=a_{2-1}+11\\a_2= a_1+11 \\a_2= 4+11 \\a_2= 15\\\\d = a_2-a_1 \\d= 15-4 \\d= 11\\\\S_{650}=?\\\\\implies n = 650\\\\$

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