What is the fourth proportional for the quantities 2, 4, 5?, 20, 10, What is the S.S. for the equation: √5 x - 1 = 4 in R?, {√5}, {5}, The ordered pair (1, 3) belongs to the function f where:, f(x) = 3x - 1, f(x) = -3x + 6, The first proportional for the quantities 2 , 3 , 6 is ..., 2, 1, If (a + 3, b - 2) = (5, 5). What's the value of a + b?, 9, 5, If X = {2} , Y = {3}, then x × y= ..., {(2, 3)}, {6}, What's the third proportional for x⁴ , 2x³?, 4x², 4x³, If: n(X²) = 9, (X x Y) = 12 then: n(Y²) = ..., 8, 16, If X = {5, 7, 8}, Y = {9, 10} and R is a function from X to Y where:R = {(5, 9), (8, 9), (k, 9)}, what's the value of k?, 8, 7, What is the S.S. for the inequality: 5 x ≤ 25 in R?, ]-∞, 5], ]-∞, 5[
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