identify 2 examples of:
a) elements essential for plant life
b) elements essential for animal life
c) compounds essential for plant life
d) compounds essential for animal life
but u cant use carbon LOLS...
a certain tank can b filled by 2 pipes in 80 mins. The larger pipe itself can fill the tank in 2 hrs less than the smaller pipe by itself . How long does each pipe take to fill the tank on its own.
Two trains each make a journey of 330 km. One of the trains travel 5 km/h faster than the other...
yea sorry but im new to this extension stuff so im noob but i really tried
anyways:
Use mathematical induction to prove that for all positive integers n:
(a) 1^2+2^2+3^2+...+ N^2 = (1/6)n(n+1)(2n+1)
show working and plz briefly explain thanks to whoever dat tries