Write the first five terms of each sequence 1.a(1) = 7, a(n) = a(n-1) - 3 for n > 2.
2.b(1) = 2,b(n) = 2 - b(n - 1) - 1 for n 2 2.
2. c(1) = 3,c(n) = 10 c(n = 1) for n 2 2.
2.d(1) = 1, d(n) = n. d(n-1) for n > 2.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )