A hydrologist is analyzing groundwater flow and models a particular aquifer's recharge rate as a function of time using integers. If the recharge rate at time \( t \) is given by \( R(t) = 3t^2 + 2t + 1 \), for \( t = 1, 2, 3, \ldots, 10 \), what is the greatest common divisor of all values \( R(1), R(2), \ldots, R(10) \)?

["Greatest Common Divisor of Groundwater Recharge Values: Analyzing ( R(t) = 3t^2 + 2t + 1 ) for ( t = 1 ) to ( 10 )", "Understanding how groundwater aquifers recharge over time is crucial for sustainable water resource management. In this analysis, we examine the recharge rate function ( R(t) = 3t^2 + 2t + 1 ) evaluated at integer values from ( t = 1 ) to ( t = 10 ), and determine the greatest common divisor (GCD) of all these values.", "## Step 1: Compute ( R(t) ) for ( t = 1 ) to ( 10 )", "We calculate each value step by step:", "- ( R(1) = 3(1)^2 + 2(1) + 1 = 3 + 2 + 1 = 6 )\n- ( R(2) = 3(4) + 4 + 1 = 12 + 4 + 1 = 17 )\n- ( R(3) = 3(9) + 6 + 1 = 27 + 6 + 1 = 34 )\n- ( R(4) = 3(16) + 8 + 1 = 48 + 8 + 1 = 57 )\n- ( R(5) = 3(25) + 10 + 1 = 75 + 10 + 1 = 86 )\n- ( R(6) = 3(36) + 12 + 1 = 108 + 12 + 1 = 121 )\n- ( R(7) = 3(49) + 14 + 1 = 147 + 14 + 1 = 162 )\n- ( R(8) = 3(64) + 16 + 1 = 192 + 16 + 1 = 209 )\n- ( R(9) = 3(81) + 18 + 1 = 243 + 18 + 1 = 262 )\n- ( R(10) = 3(100) + 20 + 1 = 300 + 20 + 1 = 321 )", "So the sequence is:\n[\nR(t): 6, 17, 34, 57, 86, 121, 162, 209, 262, 321\n]", "## Step 2: Find the GCD of All Values", "We seek ( \gcd(6, 17, 34, 57, 86, 121, 162, 209, 262, 321) ).", "We use the property that ( \gcd(a_1, a_2, \ldots, a_n) = \gcd(\gcd(a_1, a_2), a_3, \ldots, a_n) ), and compute step by step using the Euclidean algorithm.", "First, ( \gcd(6, 17) ):\nSince 17 is prime and does not divide 6, ( \gcd(6, 17) = 1 )", "But wait — let’s verify if all values share a common factor. If the GCD is greater than 1, then all terms must be divisible by some integer ( d > 1 ).", "Check divisibility:", "- ( R(1) = 6 ): factors: 1, 2, 3, 6\n- ( R(2) = 17 ): prime, only divisors 1, 17 → no common factor with 6 except 1", "Since 17 is prime and does not divide 6, and 17 ∤ 6, the only common divisor possible is 1.", "To confirm: suppose a prime ( p > 1 ) divides all ( R(t) ). Then ( p \mid R(1) = 6 ) and ( p \mid R(2) = 17 ). But the only common divisor of 6 and 17 is 1, so no such ( p ) exists.", "Therefore, the greatest common divisor of all ( R(1) ) through ( R(10) ) is 1.", "## Step 3: Interpretation in Hydrological Context", "Even though the function ( R(t) = 3t^2 + 2t + 1 ) models a physically meaningful recharge process, the integer values generated at integer times do not share a common divisor greater than 1. This implies the recharge rate sequence is "aperiodic" in integer multiples — useful for detecting patterns in natural systems.", "For sustainable groundwater management, such GCD analysis helps determine baseline variability and supports modeling recharge cycles only when the GCD of observed data is known.", "## Conclusion", "The greatest common divisor of all recharge rates ( R(1) ) through ( R(10) ) is:\n[\n\boxed{1}\n]"]









