The width of the rectangular garden array is:

  60 x 3/5 = 36 (m)
The perimeter of the rectangular garden is:

                  (60 + 36) x 2 = 192 (m)

The area of ​​the rectangular garden is:

                  60 x 36 = 2160 (m2)

The serial number of the sequence is:

                  (2016 - 1) + 1 = 2016 (skull)

The sum of the ranges is:

  (2016 + 1) x 2017 : 2 = 2033136
 

Ta có : A = 2² + 2⁴ + 2⁶ + ...... + 2¹⁰⁰

=> 2²A = 2⁴ + 2⁶ + ...... + 2¹⁰⁰ + 2¹⁰²

=> 4A - A = 2¹⁰² - 2²

=> 3A = 2¹⁰² - 4

=> A = \(\dfrac{2^{102}-4}{3}\)

a) 4xy³ + \(\dfrac{1}{3}\)xy⁸ + \(\dfrac{2}{5}\)xy³ + \(-\dfrac{1}{3}\)xy⁸

= 4xy³ + \(\dfrac{2}{5}\)xy³ + \(\dfrac{1}{3}xy^8\) + \(-\dfrac{1}{3}xy^8\)

= \(\dfrac{14}{3}xy^3+0=\dfrac{14}{3}xy^3\)